Generated: 2026-04-03 11:14:11 UTC | Model: claude-sonnet-4-6
| Sessions: 1
| # | Time | Type | Detail show 106 ok results |
|---|
| 1 |
+0.0s [+0.0s] |
user_prompt |
user_prompt: Use the generator-coding skill to approach this task.
Use DBML as the data mode…Use the generator-coding skill to approach this task.
Use DBML as the data model format and Jinja2 as the template engine.
Write a generator that reads the DBML and produces the Python SQLite code.
Create a small SQLite book-library system with these tables:
- **authors** (id, name, birth_year)
- **books** (id, title, isbn, author_id FK)
- **borrowers** (id, name, email)
- **loans** (id, book_id FK, borrower_id FK, loan_date, return_date nullable)
Then create a Python program `library.py` that:
- Creates the database and tables
- Inserts 3 sample authors, 5 books, and 2 borrowers
- Records 2 loans (one returned, one active)
- Prints a report of all active loans with book title and borrower name
Create a plan for this.▴ |
| 2 |
+0.0s [+0.0s] |
user_prompt |
user_prompt: Use the generator-coding skill to approach this task.
Use DBML as the data mode…Use the generator-coding skill to approach this task.
Use DBML as the data model format and Jinja2 as the template engine.
Write a generator that reads the DBML and produces the Python SQLite code.
Create a small SQLite book-library system with these tables:
- **authors** (id, name, birth_year)
- **books** (id, title, isbn, author_id FK)
- **borrowers** (id, name, email)
- **loans** (id, book_id FK, borrower_id FK, loan_date, return_date nullable)
Then create a Python program `library.py` that:
- Creates the database and tables
- Inserts 3 sample authors, 5 books, and 2 borrowers
- Records 2 loans (one returned, one active)
- Prints a report of all active loans with book title and borrower name
Create a plan for this.▴ |
| 3 |
+1.0s [+1.0s] |
tool_call |
Skill - skill: "generator-coding"
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| 4 |
+1.0s [+0.0s] |
tool_call |
Skill - skill: "generator-coding"
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| 5 |
+1.0s [+0.0s] |
tool_result |
PASS |
| 6 |
+1.0s [+0.0s] |
tool_result |
PASS |
| 7 |
+5.0s [+4.0s] |
tool_call |
EnterPlanMode {} |
| 8 |
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tool_call |
EnterPlanMode {} |
| 9 |
+5.0s [+0.0s] |
tool_result |
PASS |
| 10 |
+5.0s [+0.0s] |
tool_result |
PASS |
| 11 |
+6.0s [+1.0s] |
tool_call |
Bash - command: ls /tmp/pytest-sandbox/test_library_generator_with_sk0/project/ 2>/dev/null && echo "---" && cat /tmp/pytest-sandbox/test_library_generator_with_sk0/project/CLAUDE.md 2>/dev/null || echo "No CLAUDE.md…ls /tmp/pytest-sandbox/test_library_generator_with_sk0/project/ 2>/dev/null && echo "---" && cat /tmp/pytest-sandbox/test_library_generator_with_sk0/project/CLAUDE.md 2>/dev/null || echo "No CLAUDE.md"▴
- description: "List project directory and read CLAUDE.md"
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| 12 |
+6.0s [+0.0s] |
tool_call |
Bash - command: ls /tmp/pytest-sandbox/test_library_generator_with_sk0/project/ 2>/dev/null && echo "---" && cat /tmp/pytest-sandbox/test_library_generator_with_sk0/project/CLAUDE.md 2>/dev/null || echo "No CLAUDE.md…ls /tmp/pytest-sandbox/test_library_generator_with_sk0/project/ 2>/dev/null && echo "---" && cat /tmp/pytest-sandbox/test_library_generator_with_sk0/project/CLAUDE.md 2>/dev/null || echo "No CLAUDE.md"▴
- description: "List project directory and read CLAUDE.md"
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tool_result |
PASS |
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tool_result |
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| 15 |
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tool_call |
Agent - description: "Explore project structure and audit script"
- prompt: Explore the project at /tmp/pytest-sandbox/test_library_generator_with_sk0/project/. I need to understand:
1. The full directory structure (run ls -la recursively)
2. The contents of audit/agent-repor…Explore the project at /tmp/pytest-sandbox/test_library_generator_with_sk0/project/. I need to understand:
1. The full directory structure (run ls -la recursively)
2. The contents of audit/agent-report.sh
3. Any existing Python files, templates, or DBML files
Report all findings including exact file contents for key files like agent-report.sh.▴
- subagent_type: "Explore"
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| 16 |
+11.0s [+0.0s] |
tool_call |
Agent - description: "Explore project structure and audit script"
- prompt: Explore the project at /tmp/pytest-sandbox/test_library_generator_with_sk0/project/. I need to understand:
1. The full directory structure (run ls -la recursively)
2. The contents of audit/agent-repor…Explore the project at /tmp/pytest-sandbox/test_library_generator_with_sk0/project/. I need to understand:
1. The full directory structure (run ls -la recursively)
2. The contents of audit/agent-report.sh
3. Any existing Python files, templates, or DBML files
Report all findings including exact file contents for key files like agent-report.sh.▴
- subagent_type: "Explore"
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| 17 |
+13.0s [+2.0s] |
tool_call |
Bash - command: "find /tmp/pytest-sandbox/test_library_generator_with_sk0/project -type f -o -type d | head -200"
- description: "List all files and directories recursively"
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tool_call |
Bash - command: "find /tmp/pytest-sandbox/test_library_generator_with_sk0/project -type f -o -type d | head -200"
- description: "List all files and directories recursively"
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tool_call |
Read - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/audit/agent-report.sh"
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tool_call |
Read - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/audit/agent-report.sh"
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tool_call |
Glob - pattern: "**/*.py"
- path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project"
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tool_call |
Glob - pattern: "**/*.py"
- path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project"
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tool_call |
Glob - pattern: "**/*.dbml"
- path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project"
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tool_call |
Glob - pattern: "**/*.dbml"
- path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project"
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tool_result |
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tool_call |
Glob - pattern: "**/*template*"
- path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project"
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tool_call |
Glob - pattern: "**/*template*"
- path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project"
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tool_call |
Bash - command: "find /tmp/pytest-sandbox/test_library_generator_with_sk0/project -type f \( -not -path '*/.git/*' -not -path '*/.claude/*' \) | sort"
- description: "List all non-git, non-.claude files in the project"
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tool_call |
Bash - command: "find /tmp/pytest-sandbox/test_library_generator_with_sk0/project -type f \( -not -path '*/.git/*' -not -path '*/.claude/*' \) | sort"
- description: "List all non-git, non-.claude files in the project"
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tool_call |
Read - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project"
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Read - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project"
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tool_call |
Read - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/CLAUDE.md"
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Read - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/CLAUDE.md"
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Read - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/.gitignore"
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tool_call |
Bash - command: "ls -la /tmp/pytest-sandbox/test_library_generator_with_sk0/project/"
- description: "List top-level directory contents"
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tool_call |
Bash - command: "ls -la /tmp/pytest-sandbox/test_library_generator_with_sk0/project/"
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tool_call |
Bash - command: "ls -la /tmp/pytest-sandbox/test_library_generator_with_sk0/project/audit/"
- description: "List audit directory contents"
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tool_call |
Bash - command: "ls -la /tmp/pytest-sandbox/test_library_generator_with_sk0/project/audit/"
- description: "List audit directory contents"
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Bash - command: "ls -la /tmp/pytest-sandbox/test_library_generator_with_sk0/project/audit/ops_record/"
- description: "List audit/ops_record directory contents"
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tool_call |
Bash - command: "ls -la /tmp/pytest-sandbox/test_library_generator_with_sk0/project/audit/ops_record/"
- description: "List audit/ops_record directory contents"
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Read - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/audit/ops_record/20260403T110626Z-4388661e-b640-44a8-be57-c0b7f1149e01.jsonl"
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Read - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/audit/ops_record/20260403T110626Z-4388661e-b640-44a8-be57-c0b7f1149e01.jsonl"
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Bash - command: "ls -la /tmp/pytest-sandbox/test_library_generator_with_sk0/project/audit/dev_record/"
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Bash - command: "ls -la /tmp/pytest-sandbox/test_library_generator_with_sk0/project/audit/dev_record/"
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tool_call |
Bash - command: "find /tmp/pytest-sandbox/test_library_generator_with_sk0/project/.claude -type f | head -50"
- description: "List .claude directory files"
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tool_call |
Bash - command: "find /tmp/pytest-sandbox/test_library_generator_with_sk0/project/.claude -type f | head -50"
- description: "List .claude directory files"
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tool_call |
Agent - description: "Design generator-coding implementation plan"
- prompt: Design a concrete implementation plan for a template-based code generator that reads a DBML schema and produces Python SQLite code, following the generator-coding skill's pipeline pattern.
## Context…Design a concrete implementation plan for a template-based code generator that reads a DBML schema and produces Python SQLite code, following the generator-coding skill's pipeline pattern.
## Context
- Project is an empty sandbox (no existing Python/DBML/template files)
- Must follow the generator-coding skill's pipeline: Data Model → Parser → Helpers → Template Engine → Generated Output
- Data model format: DBML (Database Markup Language)
- Template engine: Jinja2
- Target language: Python (SQLite via `sqlite3` stdlib)
- Output used by: `library.py` (the final user-facing program)
## Requirements
### Schema (DBML) — 4 tables
- **authors** (id INTEGER PK, name TEXT NOT NULL, birth_year INTEGER)
- **books** (id INTEGER PK, title TEXT NOT NULL, isbn TEXT UNIQUE, author_id INTEGER FK→authors.id)
- **borrowers** (id INTEGER PK, name TEXT NOT NULL, email TEXT UNIQUE)
- **loans** (id INTEGER PK, book_id INTEGER FK→books.id, borrower_id INTEGER FK→borrowers.id, loan_date TEXT NOT NULL, return_date TEXT nullable)
### library.py behavior
1. Creates the SQLite database and all tables (using generated schema code)
2. Inserts 3 sample authors, 5 books, 2 borrowers
3. Records 2 loans (one returned, one active)
4. Prints report of active loans: book title + borrower name
### Generator-coding skill pipeline rules
- Data Model: `schema.dbml`
- Parser: Python script that reads DBML and produces an in-memory Python data structure (list of table dicts with columns, PKs, FKs, constraints)
- Helpers: reshape/filter parsed data for template consumption (e.g., map DBML types to SQLite types, identify nullable columns, format FK constraints)
- Template: `templates/table_schema.py.jinja2` — system-level template covering all tables (since they all go in one generated file)
- Generated output: `generated/schema.py` — contains `create_tables(conn)` function and table column metadata
- Driver script: `generator/generate.py` — connects parser + helpers + template, writes output file
- `library.py` — imports from `generated/schema.py`
### File layout to design
```
schema.dbml # DBML data model
generator/
__init__.py
parser.py # DBML parser → Python dicts
helpers.py # Reshape for templates
generate.py # Driver: parse → help → render → write
templates/
schema.py.jinja2 # Jinja2 template → generated/schema.py
generated/
schema.py # Generated output (never hand-edited)
library.py # User program: imports generated/schema.py
```
## Plan Requirements
Design a step-by-step implementation plan. For each file, specify:
1. Exact file path
2. Key interfaces (function signatures, what it returns)
3. How it connects to adjacent pipeline stages
For the DBML parser specifically: DBML has no widely-used Python parser library. Design a simple regex/line-by-line parser that handles the subset needed (Table blocks, column definitions with types and constraints, Ref declarations for FKs). Keep it minimal but correct for this schema.
For the Jinja2 template: show the template structure with placeholders for the CREATE TABLE statements and FK constraints.
For the generated output: show the expected structure of `generated/schema.py` — it should export `create_tables(conn)` and a `TABLES` metadata dict.
Include a verification section: how to run the generator and then run library.py to confirm correctness.▴
- subagent_type: "Plan"
|
| 78 |
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tool_call |
Agent - description: "Design generator-coding implementation plan"
- prompt: Design a concrete implementation plan for a template-based code generator that reads a DBML schema and produces Python SQLite code, following the generator-coding skill's pipeline pattern.
## Context…Design a concrete implementation plan for a template-based code generator that reads a DBML schema and produces Python SQLite code, following the generator-coding skill's pipeline pattern.
## Context
- Project is an empty sandbox (no existing Python/DBML/template files)
- Must follow the generator-coding skill's pipeline: Data Model → Parser → Helpers → Template Engine → Generated Output
- Data model format: DBML (Database Markup Language)
- Template engine: Jinja2
- Target language: Python (SQLite via `sqlite3` stdlib)
- Output used by: `library.py` (the final user-facing program)
## Requirements
### Schema (DBML) — 4 tables
- **authors** (id INTEGER PK, name TEXT NOT NULL, birth_year INTEGER)
- **books** (id INTEGER PK, title TEXT NOT NULL, isbn TEXT UNIQUE, author_id INTEGER FK→authors.id)
- **borrowers** (id INTEGER PK, name TEXT NOT NULL, email TEXT UNIQUE)
- **loans** (id INTEGER PK, book_id INTEGER FK→books.id, borrower_id INTEGER FK→borrowers.id, loan_date TEXT NOT NULL, return_date TEXT nullable)
### library.py behavior
1. Creates the SQLite database and all tables (using generated schema code)
2. Inserts 3 sample authors, 5 books, 2 borrowers
3. Records 2 loans (one returned, one active)
4. Prints report of active loans: book title + borrower name
### Generator-coding skill pipeline rules
- Data Model: `schema.dbml`
- Parser: Python script that reads DBML and produces an in-memory Python data structure (list of table dicts with columns, PKs, FKs, constraints)
- Helpers: reshape/filter parsed data for template consumption (e.g., map DBML types to SQLite types, identify nullable columns, format FK constraints)
- Template: `templates/table_schema.py.jinja2` — system-level template covering all tables (since they all go in one generated file)
- Generated output: `generated/schema.py` — contains `create_tables(conn)` function and table column metadata
- Driver script: `generator/generate.py` — connects parser + helpers + template, writes output file
- `library.py` — imports from `generated/schema.py`
### File layout to design
```
schema.dbml # DBML data model
generator/
__init__.py
parser.py # DBML parser → Python dicts
helpers.py # Reshape for templates
generate.py # Driver: parse → help → render → write
templates/
schema.py.jinja2 # Jinja2 template → generated/schema.py
generated/
schema.py # Generated output (never hand-edited)
library.py # User program: imports generated/schema.py
```
## Plan Requirements
Design a step-by-step implementation plan. For each file, specify:
1. Exact file path
2. Key interfaces (function signatures, what it returns)
3. How it connects to adjacent pipeline stages
For the DBML parser specifically: DBML has no widely-used Python parser library. Design a simple regex/line-by-line parser that handles the subset needed (Table blocks, column definitions with types and constraints, Ref declarations for FKs). Keep it minimal but correct for this schema.
For the Jinja2 template: show the template structure with placeholders for the CREATE TABLE statements and FK constraints.
For the generated output: show the expected structure of `generated/schema.py` — it should export `create_tables(conn)` and a `TABLES` metadata dict.
Include a verification section: how to run the generator and then run library.py to confirm correctness.▴
- subagent_type: "Plan"
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tool_call |
Bash - command: "ls /tmp/pytest-sandbox/test_library_generator_with_sk0/project/ && git -C /tmp/pytest-sandbox/test_library_generator_with_sk0/project log --oneline -5 2>/dev/null || true"
- description: "List project root and recent git log"
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tool_call |
Bash - command: "ls /tmp/pytest-sandbox/test_library_generator_with_sk0/project/ && git -C /tmp/pytest-sandbox/test_library_generator_with_sk0/project log --oneline -5 2>/dev/null || true"
- description: "List project root and recent git log"
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tool_result |
PASS |
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tool_result |
PASS |
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tool_call |
Skill - skill: "generator-coding"
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tool_call |
Skill - skill: "generator-coding"
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tool_result |
PASS |
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PASS |
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tool_call |
Bash - command: "ls /tmp/pytest-sandbox/test_library_generator_with_sk0/project/audit/ && cat /tmp/pytest-sandbox/test_library_generator_with_sk0/project/CLAUDE.md"
- description: "Read audit directory and CLAUDE.md"
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tool_call |
Bash - command: "ls /tmp/pytest-sandbox/test_library_generator_with_sk0/project/audit/ && cat /tmp/pytest-sandbox/test_library_generator_with_sk0/project/CLAUDE.md"
- description: "Read audit directory and CLAUDE.md"
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tool_result |
PASS |
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tool_call |
Bash - command: ls /tmp/pytest-sandbox/test_library_generator_with_sk0/ && find /tmp/pytest-sandbox/test_library_generator_with_sk0/ -name "*.py" -o -name "*.dbml" -o -name "*.jinja2" -o -name "*.md" 2>/dev/null | so…ls /tmp/pytest-sandbox/test_library_generator_with_sk0/ && find /tmp/pytest-sandbox/test_library_generator_with_sk0/ -name "*.py" -o -name "*.dbml" -o -name "*.jinja2" -o -name "*.md" 2>/dev/null | sort▴
- description: "List sandbox root and find all relevant files"
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+70.0s [+0.0s] |
tool_call |
Bash - command: ls /tmp/pytest-sandbox/test_library_generator_with_sk0/ && find /tmp/pytest-sandbox/test_library_generator_with_sk0/ -name "*.py" -o -name "*.dbml" -o -name "*.jinja2" -o -name "*.md" 2>/dev/null | so…ls /tmp/pytest-sandbox/test_library_generator_with_sk0/ && find /tmp/pytest-sandbox/test_library_generator_with_sk0/ -name "*.py" -o -name "*.dbml" -o -name "*.jinja2" -o -name "*.md" 2>/dev/null | sort▴
- description: "List sandbox root and find all relevant files"
|
| 93 |
+70.0s [+0.0s] |
tool_result |
PASS |
| 94 |
+70.0s [+0.0s] |
tool_result |
PASS |
| 95 |
+74.0s [+4.0s] |
tool_call |
Bash - command: "python3 --version && python3 -c "import jinja2; print('jinja2', jinja2.__version__)" 2>/dev/null || echo "jinja2 not available""
- description: "Check Python and Jinja2 availability"
|
| 96 |
+74.0s [+0.0s] |
tool_call |
Bash - command: "python3 --version && python3 -c "import jinja2; print('jinja2', jinja2.__version__)" 2>/dev/null || echo "jinja2 not available""
- description: "Check Python and Jinja2 availability"
|
| 97 |
+74.0s [+0.0s] |
tool_result |
PASS |
| 98 |
+74.0s [+0.0s] |
tool_result |
PASS |
| 99 |
+168.0s [+94.0s] |
tool_result |
PASS |
| 100 |
+168.0s [+0.0s] |
tool_result |
PASS |
| 101 |
+217.0s [+49.0s] |
tool_call |
Write - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/.claude/plans/goofy-wiggling-kitten.md"
- content: # Plan: DBML-to-Python-SQLite Code Generator — Book Library
## Context
The user wants a template-based code generator (following the generator-coding skill) that reads a DBML schema and produces Pyt…# Plan: DBML-to-Python-SQLite Code Generator — Book Library
## Context
The user wants a template-based code generator (following the generator-coding skill) that reads a DBML schema and produces Python SQLite code. The generated code is then consumed by a hand-written `library.py` that seeds data and prints a report.
**Why this approach:** The generator-coding skill mandates separating the data model (DBML), transformation logic (helpers), and output structure (Jinja2 template) into independent layers. This means changes to the schema only require editing `schema.dbml` and re-running the generator — not touching any Python DDL code by hand.
---
## Pipeline Architecture
```
schema.dbml → parser.py → helpers.py → schema.py.jinja2 → generated/schema.py
(Data Model) (Parser) (Helpers) (Template) (Generated Output)
↑
generate.py (Driver)
↓
library.py (Consumer)
```
**Generation unit:** System-level — one template, one output file for all four tables. Justified because all tables belong in one `CREATE TABLE` script and FK constraints require all tables to be visible together.
---
## Files to Create
### Implementation sequence (dependency order)
| # | File | Type | Notes |
|---|------|------|-------|
| 1 | `schema.dbml` | Hand-written | Data model — single source of truth |
| 2 | `generator/__init__.py` | Hand-written | Package marker (empty) |
| 3 | `generator/parser.py` | Hand-written | DBML → Python dicts |
| 4 | `generator/helpers.py` | Hand-written | Reshape for template |
| 5 | `templates/schema.py.jinja2` | Hand-written | Jinja2 template |
| 6 | `generator/generate.py` | Hand-written | Driver script |
| 7 | `generated/schema.py` | **Generated** | Run `python generator/generate.py` |
| 8 | `library.py` | Hand-written | Consumer of generated code |
---
## File Specifications
### 1. `schema.dbml`
DBML schema for four tables using bracket-syntax constraints (`[pk]`, `[not null]`, `[unique]`) and `Ref:` declarations with `>` (many-to-one) notation.
```dbml
Table authors {
id INTEGER [pk]
name TEXT [not null]
birth_year INTEGER
}
Table books {
id INTEGER [pk]
title TEXT [not null]
isbn TEXT [unique]
author_id INTEGER
}
Table borrowers {
id INTEGER [pk]
name TEXT [not null]
email TEXT [unique]
}
Table loans {
id INTEGER [pk]
book_id INTEGER
borrower_id INTEGER
loan_date TEXT [not null]
return_date TEXT
}
Ref: books.author_id > authors.id
Ref: loans.book_id > books.id
Ref: loans.borrower_id > borrowers.id
```
Table order in DBML matches FK dependency order — no topological sort needed.
---
### 2. `generator/parser.py`
Line-by-line state-machine parser (no third-party DBML library — none reliable exists).
**Interface:**
```python
def parse_dbml(filepath: str) -> dict
```
**Returns:**
```python
{
"tables": [
{
"name": "authors",
"columns": [
{"name": "id", "type": "INTEGER", "pk": True, "not_null": True, "unique": False, "nullable": False},
{"name": "name", "type": "TEXT", "pk": False, "not_null": True, "unique": False, "nullable": False},
{"name": "birth_year", "type": "INTEGER", "pk": False, "not_null": False, "unique": False, "nullable": True},
],
"pk_columns": ["id"]
},
...
],
"refs": [
{"from_table": "books", "from_col": "author_id", "to_table": "authors", "to_col": "id"},
...
]
}
```
**Algorithm:**
- Two states: `OUTSIDE` / `INSIDE_TABLE`
- `Table <name> {` → enter table state
- `}` → exit table state, save table
- Column lines matched by regex: `r'^\s*(\w+)\s+(\w+)(?:\s+\[([^\]]*)\])?\s*$'`
- `Ref:` lines matched by regex: `r'^Ref:\s*(\w+)\.(\w+)\s*>\s*(\w+)\.(\w+)'`
- `nullable = not (pk or not_null)` — derived in parser
- Raise `ValueError` with line number on malformed input
---
### 3. `generator/helpers.py`
Reshapes raw parsed data into Jinja2-ready context. All transformation logic here — none in the template.
**Interface:**
```python
def prepare_context(parsed: dict) -> dict
```
**Returns:**
```python
{
"tables": [
{
"name": "authors",
"columns": [
{"name": "id", "sql_type": "INTEGER", "constraints": "PRIMARY KEY", "nullable": False},
{"name": "name", "sql_type": "TEXT", "constraints": "NOT NULL", "nullable": False},
{"name": "birth_year", "sql_type": "INTEGER", "constraints": "", "nullable": True},
],
"foreign_keys": [],
"col_names": ["id", "name", "birth_year"],
},
...
]
}
```
**Internal helpers:**
- `_map_type(dbml_type)` — maps DBML types to SQLite affinities
- `_build_constraint_fragment(col)` — produces `"PRIMARY KEY"`, `"NOT NULL UNIQUE"`, `""`, etc. — enforces ordering (PK before NOT NULL)
- `_build_foreign_keys(table_name, refs)` — filters refs to find FKs for a given table
---
### 4. `templates/schema.py.jinja2`
System-level template. Renders the complete `generated/schema.py`.
**Jinja2 environment:** `trim_blocks=True`, `lstrip_blocks=True`, `undefined=StrictUndefined`
**Template structure:**
```jinja2
# GENERATED FILE — do not edit by hand.
# Source: schema.dbml | Template: templates/schema.py.jinja2
# Regenerate with: python generator/generate.py
import sqlite3
def create_tables(conn: sqlite3.Connection) -> None:
"""Create all tables defined in schema.dbml."""
cursor = conn.cursor()
cursor.executescript("""
PRAGMA foreign_keys = ON;
{% for table in tables %}
CREATE TABLE IF NOT EXISTS {{ table.name }} (
{% for col in table.columns %}
{% if not loop.last or table.foreign_keys %}
{{ col.name }} {{ col.sql_type }}{% if col.constraints %} {{ col.constraints }}{% endif %},
{% else %}
{{ col.name }} {{ col.sql_type }}{% if col.constraints %} {{ col.constraints }}{% endif %}
{% endif %}
{% endfor %}
{% for fk in table.foreign_keys %}
{% if not loop.last %}
FOREIGN KEY ({{ fk.col }}) REFERENCES {{ fk.ref_table }}({{ fk.ref_col }}),
{% else %}
FOREIGN KEY ({{ fk.col }}) REFERENCES {{ fk.ref_table }}({{ fk.ref_col }})
{% endif %}
{% endfor %}
);
{% endfor %}
""")
conn.commit()
TABLES: dict[str, list[str]] = {
{% for table in tables %}
"{{ table.name }}": {{ table.col_names }},
{% endfor %}
}
```
**Note:** Trailing-comma logic (`loop.last` + FK check) is the one conditional in the template — it cannot be pre-computed in helpers because it depends on render-time loop position.
---
### 5. `generator/generate.py`
Driver script connecting all pipeline stages.
```python
def main() -> None:
parsed = parse_dbml("schema.dbml")
context = prepare_context(parsed)
env = jinja2.Environment(loader=FileSystemLoader("templates"), trim_blocks=True,
lstrip_blocks=True, undefined=StrictUndefined)
output = env.get_template("schema.py.jinja2").render(**context)
Path("generated").mkdir(parents=True, exist_ok=True)
Path("generated/schema.py").write_text(output, encoding="utf-8")
print("Generated: generated/schema.py")
```
Run from project root: `python generator/generate.py`
---
### 6. `generated/schema.py` (generated — do not hand-create)
Produced by running the generator. Exports:
- `create_tables(conn: sqlite3.Connection) -> None`
- `TABLES: dict[str, list[str]]`
Expected output for the four-table schema (see plan agent output for full rendered example).
---
### 7. `library.py`
Consumer of `generated/schema.py`. Never imports from `generator/`.
**Behavior:**
1. Connect to `library.db` (SQLite file)
2. Call `create_tables(conn)` from generated module
3. `seed_data(conn)` — inserts 3 authors, 5 books, 2 borrowers, 2 loans using `INSERT OR IGNORE` (idempotent)
4. `print_active_loans(conn)` — JOIN query filtering `WHERE loans.return_date IS NULL`
**Sample data:**
- Authors: George Orwell (1903), Ursula K. Le Guin (1929), Frank Herbert (1920)
- Books: 1984, Animal Farm (Orwell), Left Hand of Darkness + The Dispossessed (Le Guin), Dune (Herbert)
- Borrowers: Alice Smith, Bob Jones
- Loans: Alice borrowed 1984 (returned 2026-03-15), Bob borrowed Dune (active, no return date)
**Expected output:**
```
Active Loans:
----------------------------------------
Dune → Bob Jones
```
---
## Pre-implementation Step: Log `plan_stated`
Before writing any files, run:
```bash
bash audit/agent-report.sh "<SESSION_ID>" "plan_stated" "DBML+Jinja2 generator for SQLite book-library: schema.dbml → parser → helpers → template → generated/schema.py → library.py"
```
---
## Verification
| Step | Command | Expected result |
|------|---------|----------------|
| Run generator | `python generator/generate.py` | Prints `Generated: generated/schema.py` |
| Inspect output | `cat generated/schema.py` | 4× `CREATE TABLE IF NOT EXISTS`, 3× `FOREIGN KEY`, `TABLES` dict |
| Run library | `python library.py` | Prints `Active Loans:` + `Dune → Bob Jones` |
| Idempotence check | Run `python library.py` twice | Same output, no duplicate rows (due to `INSERT OR IGNORE`) |
| Generator determinism | Run `python generator/generate.py` twice | Identical `generated/schema.py` both times |
---
## Key Design Decisions
| Decision | Rationale |
|----------|-----------|
| Custom line-by-line DBML parser | No reliable Python DBML parser library exists; needed subset is small |
| Nullable derived in parser | `nullable = not (pk or not_null)` is semantic — belongs in parser, not template |
| Constraint string built in helpers | Ordering rule (PK before NOT NULL) is data logic — generator-coding skill rule 3 |
| `loop.last` + FK check in template | Trailing-comma is a render-time positional concern; cannot be pre-computed |
| `INSERT OR IGNORE` in library.py | Makes `library.py` idempotent across multiple runs |
| Table order in DBML matches FK dependency | Avoids topological sort; makes dependency order explicit in the data model |
▴
|
| 102 |
+217.0s [+0.0s] |
tool_call |
Write - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/.claude/plans/goofy-wiggling-kitten.md"
- content: # Plan: DBML-to-Python-SQLite Code Generator — Book Library
## Context
The user wants a template-based code generator (following the generator-coding skill) that reads a DBML schema and produces Pyt…# Plan: DBML-to-Python-SQLite Code Generator — Book Library
## Context
The user wants a template-based code generator (following the generator-coding skill) that reads a DBML schema and produces Python SQLite code. The generated code is then consumed by a hand-written `library.py` that seeds data and prints a report.
**Why this approach:** The generator-coding skill mandates separating the data model (DBML), transformation logic (helpers), and output structure (Jinja2 template) into independent layers. This means changes to the schema only require editing `schema.dbml` and re-running the generator — not touching any Python DDL code by hand.
---
## Pipeline Architecture
```
schema.dbml → parser.py → helpers.py → schema.py.jinja2 → generated/schema.py
(Data Model) (Parser) (Helpers) (Template) (Generated Output)
↑
generate.py (Driver)
↓
library.py (Consumer)
```
**Generation unit:** System-level — one template, one output file for all four tables. Justified because all tables belong in one `CREATE TABLE` script and FK constraints require all tables to be visible together.
---
## Files to Create
### Implementation sequence (dependency order)
| # | File | Type | Notes |
|---|------|------|-------|
| 1 | `schema.dbml` | Hand-written | Data model — single source of truth |
| 2 | `generator/__init__.py` | Hand-written | Package marker (empty) |
| 3 | `generator/parser.py` | Hand-written | DBML → Python dicts |
| 4 | `generator/helpers.py` | Hand-written | Reshape for template |
| 5 | `templates/schema.py.jinja2` | Hand-written | Jinja2 template |
| 6 | `generator/generate.py` | Hand-written | Driver script |
| 7 | `generated/schema.py` | **Generated** | Run `python generator/generate.py` |
| 8 | `library.py` | Hand-written | Consumer of generated code |
---
## File Specifications
### 1. `schema.dbml`
DBML schema for four tables using bracket-syntax constraints (`[pk]`, `[not null]`, `[unique]`) and `Ref:` declarations with `>` (many-to-one) notation.
```dbml
Table authors {
id INTEGER [pk]
name TEXT [not null]
birth_year INTEGER
}
Table books {
id INTEGER [pk]
title TEXT [not null]
isbn TEXT [unique]
author_id INTEGER
}
Table borrowers {
id INTEGER [pk]
name TEXT [not null]
email TEXT [unique]
}
Table loans {
id INTEGER [pk]
book_id INTEGER
borrower_id INTEGER
loan_date TEXT [not null]
return_date TEXT
}
Ref: books.author_id > authors.id
Ref: loans.book_id > books.id
Ref: loans.borrower_id > borrowers.id
```
Table order in DBML matches FK dependency order — no topological sort needed.
---
### 2. `generator/parser.py`
Line-by-line state-machine parser (no third-party DBML library — none reliable exists).
**Interface:**
```python
def parse_dbml(filepath: str) -> dict
```
**Returns:**
```python
{
"tables": [
{
"name": "authors",
"columns": [
{"name": "id", "type": "INTEGER", "pk": True, "not_null": True, "unique": False, "nullable": False},
{"name": "name", "type": "TEXT", "pk": False, "not_null": True, "unique": False, "nullable": False},
{"name": "birth_year", "type": "INTEGER", "pk": False, "not_null": False, "unique": False, "nullable": True},
],
"pk_columns": ["id"]
},
...
],
"refs": [
{"from_table": "books", "from_col": "author_id", "to_table": "authors", "to_col": "id"},
...
]
}
```
**Algorithm:**
- Two states: `OUTSIDE` / `INSIDE_TABLE`
- `Table <name> {` → enter table state
- `}` → exit table state, save table
- Column lines matched by regex: `r'^\s*(\w+)\s+(\w+)(?:\s+\[([^\]]*)\])?\s*$'`
- `Ref:` lines matched by regex: `r'^Ref:\s*(\w+)\.(\w+)\s*>\s*(\w+)\.(\w+)'`
- `nullable = not (pk or not_null)` — derived in parser
- Raise `ValueError` with line number on malformed input
---
### 3. `generator/helpers.py`
Reshapes raw parsed data into Jinja2-ready context. All transformation logic here — none in the template.
**Interface:**
```python
def prepare_context(parsed: dict) -> dict
```
**Returns:**
```python
{
"tables": [
{
"name": "authors",
"columns": [
{"name": "id", "sql_type": "INTEGER", "constraints": "PRIMARY KEY", "nullable": False},
{"name": "name", "sql_type": "TEXT", "constraints": "NOT NULL", "nullable": False},
{"name": "birth_year", "sql_type": "INTEGER", "constraints": "", "nullable": True},
],
"foreign_keys": [],
"col_names": ["id", "name", "birth_year"],
},
...
]
}
```
**Internal helpers:**
- `_map_type(dbml_type)` — maps DBML types to SQLite affinities
- `_build_constraint_fragment(col)` — produces `"PRIMARY KEY"`, `"NOT NULL UNIQUE"`, `""`, etc. — enforces ordering (PK before NOT NULL)
- `_build_foreign_keys(table_name, refs)` — filters refs to find FKs for a given table
---
### 4. `templates/schema.py.jinja2`
System-level template. Renders the complete `generated/schema.py`.
**Jinja2 environment:** `trim_blocks=True`, `lstrip_blocks=True`, `undefined=StrictUndefined`
**Template structure:**
```jinja2
# GENERATED FILE — do not edit by hand.
# Source: schema.dbml | Template: templates/schema.py.jinja2
# Regenerate with: python generator/generate.py
import sqlite3
def create_tables(conn: sqlite3.Connection) -> None:
"""Create all tables defined in schema.dbml."""
cursor = conn.cursor()
cursor.executescript("""
PRAGMA foreign_keys = ON;
{% for table in tables %}
CREATE TABLE IF NOT EXISTS {{ table.name }} (
{% for col in table.columns %}
{% if not loop.last or table.foreign_keys %}
{{ col.name }} {{ col.sql_type }}{% if col.constraints %} {{ col.constraints }}{% endif %},
{% else %}
{{ col.name }} {{ col.sql_type }}{% if col.constraints %} {{ col.constraints }}{% endif %}
{% endif %}
{% endfor %}
{% for fk in table.foreign_keys %}
{% if not loop.last %}
FOREIGN KEY ({{ fk.col }}) REFERENCES {{ fk.ref_table }}({{ fk.ref_col }}),
{% else %}
FOREIGN KEY ({{ fk.col }}) REFERENCES {{ fk.ref_table }}({{ fk.ref_col }})
{% endif %}
{% endfor %}
);
{% endfor %}
""")
conn.commit()
TABLES: dict[str, list[str]] = {
{% for table in tables %}
"{{ table.name }}": {{ table.col_names }},
{% endfor %}
}
```
**Note:** Trailing-comma logic (`loop.last` + FK check) is the one conditional in the template — it cannot be pre-computed in helpers because it depends on render-time loop position.
---
### 5. `generator/generate.py`
Driver script connecting all pipeline stages.
```python
def main() -> None:
parsed = parse_dbml("schema.dbml")
context = prepare_context(parsed)
env = jinja2.Environment(loader=FileSystemLoader("templates"), trim_blocks=True,
lstrip_blocks=True, undefined=StrictUndefined)
output = env.get_template("schema.py.jinja2").render(**context)
Path("generated").mkdir(parents=True, exist_ok=True)
Path("generated/schema.py").write_text(output, encoding="utf-8")
print("Generated: generated/schema.py")
```
Run from project root: `python generator/generate.py`
---
### 6. `generated/schema.py` (generated — do not hand-create)
Produced by running the generator. Exports:
- `create_tables(conn: sqlite3.Connection) -> None`
- `TABLES: dict[str, list[str]]`
Expected output for the four-table schema (see plan agent output for full rendered example).
---
### 7. `library.py`
Consumer of `generated/schema.py`. Never imports from `generator/`.
**Behavior:**
1. Connect to `library.db` (SQLite file)
2. Call `create_tables(conn)` from generated module
3. `seed_data(conn)` — inserts 3 authors, 5 books, 2 borrowers, 2 loans using `INSERT OR IGNORE` (idempotent)
4. `print_active_loans(conn)` — JOIN query filtering `WHERE loans.return_date IS NULL`
**Sample data:**
- Authors: George Orwell (1903), Ursula K. Le Guin (1929), Frank Herbert (1920)
- Books: 1984, Animal Farm (Orwell), Left Hand of Darkness + The Dispossessed (Le Guin), Dune (Herbert)
- Borrowers: Alice Smith, Bob Jones
- Loans: Alice borrowed 1984 (returned 2026-03-15), Bob borrowed Dune (active, no return date)
**Expected output:**
```
Active Loans:
----------------------------------------
Dune → Bob Jones
```
---
## Pre-implementation Step: Log `plan_stated`
Before writing any files, run:
```bash
bash audit/agent-report.sh "<SESSION_ID>" "plan_stated" "DBML+Jinja2 generator for SQLite book-library: schema.dbml → parser → helpers → template → generated/schema.py → library.py"
```
---
## Verification
| Step | Command | Expected result |
|------|---------|----------------|
| Run generator | `python generator/generate.py` | Prints `Generated: generated/schema.py` |
| Inspect output | `cat generated/schema.py` | 4× `CREATE TABLE IF NOT EXISTS`, 3× `FOREIGN KEY`, `TABLES` dict |
| Run library | `python library.py` | Prints `Active Loans:` + `Dune → Bob Jones` |
| Idempotence check | Run `python library.py` twice | Same output, no duplicate rows (due to `INSERT OR IGNORE`) |
| Generator determinism | Run `python generator/generate.py` twice | Identical `generated/schema.py` both times |
---
## Key Design Decisions
| Decision | Rationale |
|----------|-----------|
| Custom line-by-line DBML parser | No reliable Python DBML parser library exists; needed subset is small |
| Nullable derived in parser | `nullable = not (pk or not_null)` is semantic — belongs in parser, not template |
| Constraint string built in helpers | Ordering rule (PK before NOT NULL) is data logic — generator-coding skill rule 3 |
| `loop.last` + FK check in template | Trailing-comma is a render-time positional concern; cannot be pre-computed |
| `INSERT OR IGNORE` in library.py | Makes `library.py` idempotent across multiple runs |
| Table order in DBML matches FK dependency | Avoids topological sort; makes dependency order explicit in the data model |
▴
|
| 103 |
+217.0s [+0.0s] |
tool_result |
PASS |
| 104 |
+217.0s [+0.0s] |
tool_result |
PASS |
| 105 |
+228.0s [+11.0s] |
tool_call |
ExitPlanMode - summary: ## Plan: DBML-to-Python-SQLite Code Generator — Book Library
### Pipeline
```
schema.dbml → parser.py → helpers.py → schema.py.jinja2 → generated/schema.py
↑
…## Plan: DBML-to-Python-SQLite Code Generator — Book Library
### Pipeline
```
schema.dbml → parser.py → helpers.py → schema.py.jinja2 → generated/schema.py
↑
generate.py (Driver)
↓
library.py (Consumer)
```
### 8 files to create (in dependency order)
| # | File | Type |
|---|------|------|
| 1 | `schema.dbml` | Hand-written data model |
| 2 | `generator/__init__.py` | Package marker (empty) |
| 3 | `generator/parser.py` | Line-by-line DBML state-machine parser |
| 4 | `generator/helpers.py` | Reshape parsed data for template |
| 5 | `templates/schema.py.jinja2` | Jinja2 template → Python DDL code |
| 6 | `generator/generate.py` | Driver: parse → help → render → write |
| 7 | `generated/schema.py` | **Produced by running the generator** |
| 8 | `library.py` | User program importing generated code |
### Key design decisions
- **Custom DBML parser** (no reliable Python library exists) — regex state machine handling `Table` blocks, column bracket-constraints, and `Ref:` declarations
- **`nullable` derived in parser** (`nullable = not (pk or not_null)`) — semantic rule, belongs in parser not template
- **Constraint string built in helpers** — ordering (PK before NOT NULL) is data-shaping logic, not template logic (generator-coding skill Rule 3)
- **`loop.last` + FK check in template** — trailing-comma problem is inherently positional at render time
- **System-level granularity** — one template, one output file (all 4 tables in one `CREATE TABLE` script)
- **`INSERT OR IGNORE` in library.py** — idempotent seed data across multiple runs
### Generated exports
- `create_tables(conn: sqlite3.Connection) -> None`
- `TABLES: dict[str, list[str]]`
### Expected library.py output
```
Active Loans:
----------------------------------------
Dune → Bob Jones
```
### First action on approval
Log `plan_stated` via `audit/agent-report.sh` before writing any files.▴
- plan: # Plan: DBML-to-Python-SQLite Code Generator — Book Library
## Context
The user wants a template-based code generator (following the generator-coding skill) that reads a DBML schema and produces Pyt…# Plan: DBML-to-Python-SQLite Code Generator — Book Library
## Context
The user wants a template-based code generator (following the generator-coding skill) that reads a DBML schema and produces Python SQLite code. The generated code is then consumed by a hand-written `library.py` that seeds data and prints a report.
**Why this approach:** The generator-coding skill mandates separating the data model (DBML), transformation logic (helpers), and output structure (Jinja2 template) into independent layers. This means changes to the schema only require editing `schema.dbml` and re-running the generator — not touching any Python DDL code by hand.
---
## Pipeline Architecture
```
schema.dbml → parser.py → helpers.py → schema.py.jinja2 → generated/schema.py
(Data Model) (Parser) (Helpers) (Template) (Generated Output)
↑
generate.py (Driver)
↓
library.py (Consumer)
```
**Generation unit:** System-level — one template, one output file for all four tables. Justified because all tables belong in one `CREATE TABLE` script and FK constraints require all tables to be visible together.
---
## Files to Create
### Implementation sequence (dependency order)
| # | File | Type | Notes |
|---|------|------|-------|
| 1 | `schema.dbml` | Hand-written | Data model — single source of truth |
| 2 | `generator/__init__.py` | Hand-written | Package marker (empty) |
| 3 | `generator/parser.py` | Hand-written | DBML → Python dicts |
| 4 | `generator/helpers.py` | Hand-written | Reshape for template |
| 5 | `templates/schema.py.jinja2` | Hand-written | Jinja2 template |
| 6 | `generator/generate.py` | Hand-written | Driver script |
| 7 | `generated/schema.py` | **Generated** | Run `python generator/generate.py` |
| 8 | `library.py` | Hand-written | Consumer of generated code |
---
## File Specifications
### 1. `schema.dbml`
DBML schema for four tables using bracket-syntax constraints (`[pk]`, `[not null]`, `[unique]`) and `Ref:` declarations with `>` (many-to-one) notation.
```dbml
Table authors {
id INTEGER [pk]
name TEXT [not null]
birth_year INTEGER
}
Table books {
id INTEGER [pk]
title TEXT [not null]
isbn TEXT [unique]
author_id INTEGER
}
Table borrowers {
id INTEGER [pk]
name TEXT [not null]
email TEXT [unique]
}
Table loans {
id INTEGER [pk]
book_id INTEGER
borrower_id INTEGER
loan_date TEXT [not null]
return_date TEXT
}
Ref: books.author_id > authors.id
Ref: loans.book_id > books.id
Ref: loans.borrower_id > borrowers.id
```
Table order in DBML matches FK dependency order — no topological sort needed.
---
### 2. `generator/parser.py`
Line-by-line state-machine parser (no third-party DBML library — none reliable exists).
**Interface:**
```python
def parse_dbml(filepath: str) -> dict
```
**Returns:**
```python
{
"tables": [
{
"name": "authors",
"columns": [
{"name": "id", "type": "INTEGER", "pk": True, "not_null": True, "unique": False, "nullable": False},
{"name": "name", "type": "TEXT", "pk": False, "not_null": True, "unique": False, "nullable": False},
{"name": "birth_year", "type": "INTEGER", "pk": False, "not_null": False, "unique": False, "nullable": True},
],
"pk_columns": ["id"]
},
...
],
"refs": [
{"from_table": "books", "from_col": "author_id", "to_table": "authors", "to_col": "id"},
...
]
}
```
**Algorithm:**
- Two states: `OUTSIDE` / `INSIDE_TABLE`
- `Table <name> {` → enter table state
- `}` → exit table state, save table
- Column lines matched by regex: `r'^\s*(\w+)\s+(\w+)(?:\s+\[([^\]]*)\])?\s*$'`
- `Ref:` lines matched by regex: `r'^Ref:\s*(\w+)\.(\w+)\s*>\s*(\w+)\.(\w+)'`
- `nullable = not (pk or not_null)` — derived in parser
- Raise `ValueError` with line number on malformed input
---
### 3. `generator/helpers.py`
Reshapes raw parsed data into Jinja2-ready context. All transformation logic here — none in the template.
**Interface:**
```python
def prepare_context(parsed: dict) -> dict
```
**Returns:**
```python
{
"tables": [
{
"name": "authors",
"columns": [
{"name": "id", "sql_type": "INTEGER", "constraints": "PRIMARY KEY", "nullable": False},
{"name": "name", "sql_type": "TEXT", "constraints": "NOT NULL", "nullable": False},
{"name": "birth_year", "sql_type": "INTEGER", "constraints": "", "nullable": True},
],
"foreign_keys": [],
"col_names": ["id", "name", "birth_year"],
},
...
]
}
```
**Internal helpers:**
- `_map_type(dbml_type)` — maps DBML types to SQLite affinities
- `_build_constraint_fragment(col)` — produces `"PRIMARY KEY"`, `"NOT NULL UNIQUE"`, `""`, etc. — enforces ordering (PK before NOT NULL)
- `_build_foreign_keys(table_name, refs)` — filters refs to find FKs for a given table
---
### 4. `templates/schema.py.jinja2`
System-level template. Renders the complete `generated/schema.py`.
**Jinja2 environment:** `trim_blocks=True`, `lstrip_blocks=True`, `undefined=StrictUndefined`
**Template structure:**
```jinja2
# GENERATED FILE — do not edit by hand.
# Source: schema.dbml | Template: templates/schema.py.jinja2
# Regenerate with: python generator/generate.py
import sqlite3
def create_tables(conn: sqlite3.Connection) -> None:
"""Create all tables defined in schema.dbml."""
cursor = conn.cursor()
cursor.executescript("""
PRAGMA foreign_keys = ON;
{% for table in tables %}
CREATE TABLE IF NOT EXISTS {{ table.name }} (
{% for col in table.columns %}
{% if not loop.last or table.foreign_keys %}
{{ col.name }} {{ col.sql_type }}{% if col.constraints %} {{ col.constraints }}{% endif %},
{% else %}
{{ col.name }} {{ col.sql_type }}{% if col.constraints %} {{ col.constraints }}{% endif %}
{% endif %}
{% endfor %}
{% for fk in table.foreign_keys %}
{% if not loop.last %}
FOREIGN KEY ({{ fk.col }}) REFERENCES {{ fk.ref_table }}({{ fk.ref_col }}),
{% else %}
FOREIGN KEY ({{ fk.col }}) REFERENCES {{ fk.ref_table }}({{ fk.ref_col }})
{% endif %}
{% endfor %}
);
{% endfor %}
""")
conn.commit()
TABLES: dict[str, list[str]] = {
{% for table in tables %}
"{{ table.name }}": {{ table.col_names }},
{% endfor %}
}
```
**Note:** Trailing-comma logic (`loop.last` + FK check) is the one conditional in the template — it cannot be pre-computed in helpers because it depends on render-time loop position.
---
### 5. `generator/generate.py`
Driver script connecting all pipeline stages.
```python
def main() -> None:
parsed = parse_dbml("schema.dbml")
context = prepare_context(parsed)
env = jinja2.Environment(loader=FileSystemLoader("templates"), trim_blocks=True,
lstrip_blocks=True, undefined=StrictUndefined)
output = env.get_template("schema.py.jinja2").render(**context)
Path("generated").mkdir(parents=True, exist_ok=True)
Path("generated/schema.py").write_text(output, encoding="utf-8")
print("Generated: generated/schema.py")
```
Run from project root: `python generator/generate.py`
---
### 6. `generated/schema.py` (generated — do not hand-create)
Produced by running the generator. Exports:
- `create_tables(conn: sqlite3.Connection) -> None`
- `TABLES: dict[str, list[str]]`
Expected output for the four-table schema (see plan agent output for full rendered example).
---
### 7. `library.py`
Consumer of `generated/schema.py`. Never imports from `generator/`.
**Behavior:**
1. Connect to `library.db` (SQLite file)
2. Call `create_tables(conn)` from generated module
3. `seed_data(conn)` — inserts 3 authors, 5 books, 2 borrowers, 2 loans using `INSERT OR IGNORE` (idempotent)
4. `print_active_loans(conn)` — JOIN query filtering `WHERE loans.return_date IS NULL`
**Sample data:**
- Authors: George Orwell (1903), Ursula K. Le Guin (1929), Frank Herbert (1920)
- Books: 1984, Animal Farm (Orwell), Left Hand of Darkness + The Dispossessed (Le Guin), Dune (Herbert)
- Borrowers: Alice Smith, Bob Jones
- Loans: Alice borrowed 1984 (returned 2026-03-15), Bob borrowed Dune (active, no return date)
**Expected output:**
```
Active Loans:
----------------------------------------
Dune → Bob Jones
```
---
## Pre-implementation Step: Log `plan_stated`
Before writing any files, run:
```bash
bash audit/agent-report.sh "<SESSION_ID>" "plan_stated" "DBML+Jinja2 generator for SQLite book-library: schema.dbml → parser → helpers → template → generated/schema.py → library.py"
```
---
## Verification
| Step | Command | Expected result |
|------|---------|----------------|
| Run generator | `python generator/generate.py` | Prints `Generated: generated/schema.py` |
| Inspect output | `cat generated/schema.py` | 4× `CREATE TABLE IF NOT EXISTS`, 3× `FOREIGN KEY`, `TABLES` dict |
| Run library | `python library.py` | Prints `Active Loans:` + `Dune → Bob Jones` |
| Idempotence check | Run `python library.py` twice | Same output, no duplicate rows (due to `INSERT OR IGNORE`) |
| Generator determinism | Run `python generator/generate.py` twice | Identical `generated/schema.py` both times |
---
## Key Design Decisions
| Decision | Rationale |
|----------|-----------|
| Custom line-by-line DBML parser | No reliable Python DBML parser library exists; needed subset is small |
| Nullable derived in parser | `nullable = not (pk or not_null)` is semantic — belongs in parser, not template |
| Constraint string built in helpers | Ordering rule (PK before NOT NULL) is data logic — generator-coding skill rule 3 |
| `loop.last` + FK check in template | Trailing-comma is a render-time positional concern; cannot be pre-computed |
| `INSERT OR IGNORE` in library.py | Makes `library.py` idempotent across multiple runs |
| Table order in DBML matches FK dependency | Avoids topological sort; makes dependency order explicit in the data model |
▴
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|
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plan_snapshot |
plan_snapshot: 2026-04-03T11-10-14Z-4388661e-b640-44a8-be57-c0b7f1149e01-plan-01.md |
| 107 |
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tool_call |
ExitPlanMode - summary: ## Plan: DBML-to-Python-SQLite Code Generator — Book Library
### Pipeline
```
schema.dbml → parser.py → helpers.py → schema.py.jinja2 → generated/schema.py
↑
…## Plan: DBML-to-Python-SQLite Code Generator — Book Library
### Pipeline
```
schema.dbml → parser.py → helpers.py → schema.py.jinja2 → generated/schema.py
↑
generate.py (Driver)
↓
library.py (Consumer)
```
### 8 files to create (in dependency order)
| # | File | Type |
|---|------|------|
| 1 | `schema.dbml` | Hand-written data model |
| 2 | `generator/__init__.py` | Package marker (empty) |
| 3 | `generator/parser.py` | Line-by-line DBML state-machine parser |
| 4 | `generator/helpers.py` | Reshape parsed data for template |
| 5 | `templates/schema.py.jinja2` | Jinja2 template → Python DDL code |
| 6 | `generator/generate.py` | Driver: parse → help → render → write |
| 7 | `generated/schema.py` | **Produced by running the generator** |
| 8 | `library.py` | User program importing generated code |
### Key design decisions
- **Custom DBML parser** (no reliable Python library exists) — regex state machine handling `Table` blocks, column bracket-constraints, and `Ref:` declarations
- **`nullable` derived in parser** (`nullable = not (pk or not_null)`) — semantic rule, belongs in parser not template
- **Constraint string built in helpers** — ordering (PK before NOT NULL) is data-shaping logic, not template logic (generator-coding skill Rule 3)
- **`loop.last` + FK check in template** — trailing-comma problem is inherently positional at render time
- **System-level granularity** — one template, one output file (all 4 tables in one `CREATE TABLE` script)
- **`INSERT OR IGNORE` in library.py** — idempotent seed data across multiple runs
### Generated exports
- `create_tables(conn: sqlite3.Connection) -> None`
- `TABLES: dict[str, list[str]]`
### Expected library.py output
```
Active Loans:
----------------------------------------
Dune → Bob Jones
```
### First action on approval
Log `plan_stated` via `audit/agent-report.sh` before writing any files.▴
- plan: # Plan: DBML-to-Python-SQLite Code Generator — Book Library
## Context
The user wants a template-based code generator (following the generator-coding skill) that reads a DBML schema and produces Pyt…# Plan: DBML-to-Python-SQLite Code Generator — Book Library
## Context
The user wants a template-based code generator (following the generator-coding skill) that reads a DBML schema and produces Python SQLite code. The generated code is then consumed by a hand-written `library.py` that seeds data and prints a report.
**Why this approach:** The generator-coding skill mandates separating the data model (DBML), transformation logic (helpers), and output structure (Jinja2 template) into independent layers. This means changes to the schema only require editing `schema.dbml` and re-running the generator — not touching any Python DDL code by hand.
---
## Pipeline Architecture
```
schema.dbml → parser.py → helpers.py → schema.py.jinja2 → generated/schema.py
(Data Model) (Parser) (Helpers) (Template) (Generated Output)
↑
generate.py (Driver)
↓
library.py (Consumer)
```
**Generation unit:** System-level — one template, one output file for all four tables. Justified because all tables belong in one `CREATE TABLE` script and FK constraints require all tables to be visible together.
---
## Files to Create
### Implementation sequence (dependency order)
| # | File | Type | Notes |
|---|------|------|-------|
| 1 | `schema.dbml` | Hand-written | Data model — single source of truth |
| 2 | `generator/__init__.py` | Hand-written | Package marker (empty) |
| 3 | `generator/parser.py` | Hand-written | DBML → Python dicts |
| 4 | `generator/helpers.py` | Hand-written | Reshape for template |
| 5 | `templates/schema.py.jinja2` | Hand-written | Jinja2 template |
| 6 | `generator/generate.py` | Hand-written | Driver script |
| 7 | `generated/schema.py` | **Generated** | Run `python generator/generate.py` |
| 8 | `library.py` | Hand-written | Consumer of generated code |
---
## File Specifications
### 1. `schema.dbml`
DBML schema for four tables using bracket-syntax constraints (`[pk]`, `[not null]`, `[unique]`) and `Ref:` declarations with `>` (many-to-one) notation.
```dbml
Table authors {
id INTEGER [pk]
name TEXT [not null]
birth_year INTEGER
}
Table books {
id INTEGER [pk]
title TEXT [not null]
isbn TEXT [unique]
author_id INTEGER
}
Table borrowers {
id INTEGER [pk]
name TEXT [not null]
email TEXT [unique]
}
Table loans {
id INTEGER [pk]
book_id INTEGER
borrower_id INTEGER
loan_date TEXT [not null]
return_date TEXT
}
Ref: books.author_id > authors.id
Ref: loans.book_id > books.id
Ref: loans.borrower_id > borrowers.id
```
Table order in DBML matches FK dependency order — no topological sort needed.
---
### 2. `generator/parser.py`
Line-by-line state-machine parser (no third-party DBML library — none reliable exists).
**Interface:**
```python
def parse_dbml(filepath: str) -> dict
```
**Returns:**
```python
{
"tables": [
{
"name": "authors",
"columns": [
{"name": "id", "type": "INTEGER", "pk": True, "not_null": True, "unique": False, "nullable": False},
{"name": "name", "type": "TEXT", "pk": False, "not_null": True, "unique": False, "nullable": False},
{"name": "birth_year", "type": "INTEGER", "pk": False, "not_null": False, "unique": False, "nullable": True},
],
"pk_columns": ["id"]
},
...
],
"refs": [
{"from_table": "books", "from_col": "author_id", "to_table": "authors", "to_col": "id"},
...
]
}
```
**Algorithm:**
- Two states: `OUTSIDE` / `INSIDE_TABLE`
- `Table <name> {` → enter table state
- `}` → exit table state, save table
- Column lines matched by regex: `r'^\s*(\w+)\s+(\w+)(?:\s+\[([^\]]*)\])?\s*$'`
- `Ref:` lines matched by regex: `r'^Ref:\s*(\w+)\.(\w+)\s*>\s*(\w+)\.(\w+)'`
- `nullable = not (pk or not_null)` — derived in parser
- Raise `ValueError` with line number on malformed input
---
### 3. `generator/helpers.py`
Reshapes raw parsed data into Jinja2-ready context. All transformation logic here — none in the template.
**Interface:**
```python
def prepare_context(parsed: dict) -> dict
```
**Returns:**
```python
{
"tables": [
{
"name": "authors",
"columns": [
{"name": "id", "sql_type": "INTEGER", "constraints": "PRIMARY KEY", "nullable": False},
{"name": "name", "sql_type": "TEXT", "constraints": "NOT NULL", "nullable": False},
{"name": "birth_year", "sql_type": "INTEGER", "constraints": "", "nullable": True},
],
"foreign_keys": [],
"col_names": ["id", "name", "birth_year"],
},
...
]
}
```
**Internal helpers:**
- `_map_type(dbml_type)` — maps DBML types to SQLite affinities
- `_build_constraint_fragment(col)` — produces `"PRIMARY KEY"`, `"NOT NULL UNIQUE"`, `""`, etc. — enforces ordering (PK before NOT NULL)
- `_build_foreign_keys(table_name, refs)` — filters refs to find FKs for a given table
---
### 4. `templates/schema.py.jinja2`
System-level template. Renders the complete `generated/schema.py`.
**Jinja2 environment:** `trim_blocks=True`, `lstrip_blocks=True`, `undefined=StrictUndefined`
**Template structure:**
```jinja2
# GENERATED FILE — do not edit by hand.
# Source: schema.dbml | Template: templates/schema.py.jinja2
# Regenerate with: python generator/generate.py
import sqlite3
def create_tables(conn: sqlite3.Connection) -> None:
"""Create all tables defined in schema.dbml."""
cursor = conn.cursor()
cursor.executescript("""
PRAGMA foreign_keys = ON;
{% for table in tables %}
CREATE TABLE IF NOT EXISTS {{ table.name }} (
{% for col in table.columns %}
{% if not loop.last or table.foreign_keys %}
{{ col.name }} {{ col.sql_type }}{% if col.constraints %} {{ col.constraints }}{% endif %},
{% else %}
{{ col.name }} {{ col.sql_type }}{% if col.constraints %} {{ col.constraints }}{% endif %}
{% endif %}
{% endfor %}
{% for fk in table.foreign_keys %}
{% if not loop.last %}
FOREIGN KEY ({{ fk.col }}) REFERENCES {{ fk.ref_table }}({{ fk.ref_col }}),
{% else %}
FOREIGN KEY ({{ fk.col }}) REFERENCES {{ fk.ref_table }}({{ fk.ref_col }})
{% endif %}
{% endfor %}
);
{% endfor %}
""")
conn.commit()
TABLES: dict[str, list[str]] = {
{% for table in tables %}
"{{ table.name }}": {{ table.col_names }},
{% endfor %}
}
```
**Note:** Trailing-comma logic (`loop.last` + FK check) is the one conditional in the template — it cannot be pre-computed in helpers because it depends on render-time loop position.
---
### 5. `generator/generate.py`
Driver script connecting all pipeline stages.
```python
def main() -> None:
parsed = parse_dbml("schema.dbml")
context = prepare_context(parsed)
env = jinja2.Environment(loader=FileSystemLoader("templates"), trim_blocks=True,
lstrip_blocks=True, undefined=StrictUndefined)
output = env.get_template("schema.py.jinja2").render(**context)
Path("generated").mkdir(parents=True, exist_ok=True)
Path("generated/schema.py").write_text(output, encoding="utf-8")
print("Generated: generated/schema.py")
```
Run from project root: `python generator/generate.py`
---
### 6. `generated/schema.py` (generated — do not hand-create)
Produced by running the generator. Exports:
- `create_tables(conn: sqlite3.Connection) -> None`
- `TABLES: dict[str, list[str]]`
Expected output for the four-table schema (see plan agent output for full rendered example).
---
### 7. `library.py`
Consumer of `generated/schema.py`. Never imports from `generator/`.
**Behavior:**
1. Connect to `library.db` (SQLite file)
2. Call `create_tables(conn)` from generated module
3. `seed_data(conn)` — inserts 3 authors, 5 books, 2 borrowers, 2 loans using `INSERT OR IGNORE` (idempotent)
4. `print_active_loans(conn)` — JOIN query filtering `WHERE loans.return_date IS NULL`
**Sample data:**
- Authors: George Orwell (1903), Ursula K. Le Guin (1929), Frank Herbert (1920)
- Books: 1984, Animal Farm (Orwell), Left Hand of Darkness + The Dispossessed (Le Guin), Dune (Herbert)
- Borrowers: Alice Smith, Bob Jones
- Loans: Alice borrowed 1984 (returned 2026-03-15), Bob borrowed Dune (active, no return date)
**Expected output:**
```
Active Loans:
----------------------------------------
Dune → Bob Jones
```
---
## Pre-implementation Step: Log `plan_stated`
Before writing any files, run:
```bash
bash audit/agent-report.sh "<SESSION_ID>" "plan_stated" "DBML+Jinja2 generator for SQLite book-library: schema.dbml → parser → helpers → template → generated/schema.py → library.py"
```
---
## Verification
| Step | Command | Expected result |
|------|---------|----------------|
| Run generator | `python generator/generate.py` | Prints `Generated: generated/schema.py` |
| Inspect output | `cat generated/schema.py` | 4× `CREATE TABLE IF NOT EXISTS`, 3× `FOREIGN KEY`, `TABLES` dict |
| Run library | `python library.py` | Prints `Active Loans:` + `Dune → Bob Jones` |
| Idempotence check | Run `python library.py` twice | Same output, no duplicate rows (due to `INSERT OR IGNORE`) |
| Generator determinism | Run `python generator/generate.py` twice | Identical `generated/schema.py` both times |
---
## Key Design Decisions
| Decision | Rationale |
|----------|-----------|
| Custom line-by-line DBML parser | No reliable Python DBML parser library exists; needed subset is small |
| Nullable derived in parser | `nullable = not (pk or not_null)` is semantic — belongs in parser, not template |
| Constraint string built in helpers | Ordering rule (PK before NOT NULL) is data logic — generator-coding skill rule 3 |
| `loop.last` + FK check in template | Trailing-comma is a render-time positional concern; cannot be pre-computed |
| `INSERT OR IGNORE` in library.py | Makes `library.py` idempotent across multiple runs |
| Table order in DBML matches FK dependency | Avoids topological sort; makes dependency order explicit in the data model |
▴
- planFilePath: "/tmp/pytest-sandbox/test_library_generator_with_sk0/.claude/plans/goofy-wiggling-kitten.md"
|
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plan_snapshot |
plan_snapshot: 2026-04-03T11-10-14Z-4388661e-b640-44a8-be57-c0b7f1149e01-plan-02.md |
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user_prompt |
user_prompt: Now implement your plan.
Use DBML as the data model and Jinja2 templates to gen…Now implement your plan.
Use DBML as the data model and Jinja2 templates to generate the Python SQLite code.
Follow the generator-coding skill: data model -> parser -> helpers -> templates -> output.
Create all files in the current directory and run the final library.py to verify it works.▴ |
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user_prompt |
user_prompt: Now implement your plan.
Use DBML as the data model and Jinja2 templates to gen…Now implement your plan.
Use DBML as the data model and Jinja2 templates to generate the Python SQLite code.
Follow the generator-coding skill: data model -> parser -> helpers -> templates -> output.
Create all files in the current directory and run the final library.py to verify it works.▴ |
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tool_call |
Bash - command: "ls /tmp/pytest-sandbox/test_library_generator_with_sk0/project/audit/ops_record/"
- description: "Find session ID from ops_record files"
|
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tool_call |
Bash - command: "ls /tmp/pytest-sandbox/test_library_generator_with_sk0/project/audit/ops_record/"
- description: "Find session ID from ops_record files"
|
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tool_result |
PASS |
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tool_result |
PASS |
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tool_call |
Bash - command: bash audit/agent-report.sh "4388661e-b640-44a8-be57-c0b7f1149e01" "plan_stated" "DBML+Jinja2 generator for SQLite book-library: schema.dbml -> parser -> helpers -> template -> generated/schema.py -> l…bash audit/agent-report.sh "4388661e-b640-44a8-be57-c0b7f1149e01" "plan_stated" "DBML+Jinja2 generator for SQLite book-library: schema.dbml -> parser -> helpers -> template -> generated/schema.py -> library.py"▴
- description: "Log plan_stated before implementing"
|
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tool_call |
Bash - command: bash audit/agent-report.sh "4388661e-b640-44a8-be57-c0b7f1149e01" "plan_stated" "DBML+Jinja2 generator for SQLite book-library: schema.dbml -> parser -> helpers -> template -> generated/schema.py -> l…bash audit/agent-report.sh "4388661e-b640-44a8-be57-c0b7f1149e01" "plan_stated" "DBML+Jinja2 generator for SQLite book-library: schema.dbml -> parser -> helpers -> template -> generated/schema.py -> library.py"▴
- description: "Log plan_stated before implementing"
|
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agent_report |
plan_stated DBML+Jinja2 generator for SQLite book-library: schema.dbml -> parser -> helpers …DBML+Jinja2 generator for SQLite book-library: schema.dbml -> parser -> helpers -> template -> generated/schema.py -> library.py▴ |
| 118 |
+252.0s [+0.0s] |
tool_result |
PASS |
| 119 |
+252.0s [+0.0s] |
tool_result |
PASS |
| 120 |
+254.0s [+2.0s] |
tool_call |
ToolSearch - query: "select:TodoWrite"
- max_results: 1
|
| 121 |
+254.0s [+0.0s] |
tool_call |
ToolSearch - query: "select:TodoWrite"
- max_results: 1
|
| 122 |
+254.0s [+0.0s] |
tool_result |
PASS |
| 123 |
+254.0s [+0.0s] |
tool_result |
PASS |
| 124 |
+261.0s [+7.0s] |
tool_call |
TodoWrite - todos: [8 items]
- [0] {content, status, activeForm}
- content: "Create schema.dbml (data model)"
- status: "in_progress"
- activeForm: "Creating schema.dbml"
- [1] {content, status, activeForm}
- content: "Create generator/parser.py (DBML parser)"
- status: "pending"
- activeForm: "Creating generator/parser.py"
- [2] {content, status, activeForm}
- content: "Create generator/helpers.py (data reshaper)"
- status: "pending"
- activeForm: "Creating generator/helpers.py"
- [3] {content, status, activeForm}
- content: "Create templates/schema.py.jinja2 (Jinja2 template)"
- status: "pending"
- activeForm: "Creating templates/schema.py.jinja2"
- [4] {content, status, activeForm}
- content: "Create generator/generate.py (driver script)"
- status: "pending"
- activeForm: "Creating generator/generate.py"
- [5] {content, status, activeForm}
- content: "Run generator to produce generated/schema.py"
- status: "pending"
- activeForm: "Running generator"
- [6] {content, status, activeForm}
- content: "Create library.py (consumer program)"
- status: "pending"
- activeForm: "Creating library.py"
- [7] {content, status, activeForm}
- content: "Run library.py to verify output"
- status: "pending"
- activeForm: "Running library.py"
|
| 125 |
+261.0s [+0.0s] |
tool_call |
TodoWrite - todos: [8 items]
- [0] {content, status, activeForm}
- content: "Create schema.dbml (data model)"
- status: "in_progress"
- activeForm: "Creating schema.dbml"
- [1] {content, status, activeForm}
- content: "Create generator/parser.py (DBML parser)"
- status: "pending"
- activeForm: "Creating generator/parser.py"
- [2] {content, status, activeForm}
- content: "Create generator/helpers.py (data reshaper)"
- status: "pending"
- activeForm: "Creating generator/helpers.py"
- [3] {content, status, activeForm}
- content: "Create templates/schema.py.jinja2 (Jinja2 template)"
- status: "pending"
- activeForm: "Creating templates/schema.py.jinja2"
- [4] {content, status, activeForm}
- content: "Create generator/generate.py (driver script)"
- status: "pending"
- activeForm: "Creating generator/generate.py"
- [5] {content, status, activeForm}
- content: "Run generator to produce generated/schema.py"
- status: "pending"
- activeForm: "Running generator"
- [6] {content, status, activeForm}
- content: "Create library.py (consumer program)"
- status: "pending"
- activeForm: "Creating library.py"
- [7] {content, status, activeForm}
- content: "Run library.py to verify output"
- status: "pending"
- activeForm: "Running library.py"
|
| 126 |
+261.0s [+0.0s] |
tool_result |
PASS |
| 127 |
+261.0s [+0.0s] |
tool_result |
PASS |
| 128 |
+266.0s [+5.0s] |
tool_call |
Write - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/schema.dbml"
- content: Table authors {
id INTEGER [pk]
name TEXT [not null]
birth_year INTEGER
}
Table books {
id INTEGER [pk]
title TEXT [not null]
isbn TEXT [unique]
author_id INTEGER
}
Table borrowers {
…Table authors {
id INTEGER [pk]
name TEXT [not null]
birth_year INTEGER
}
Table books {
id INTEGER [pk]
title TEXT [not null]
isbn TEXT [unique]
author_id INTEGER
}
Table borrowers {
id INTEGER [pk]
name TEXT [not null]
email TEXT [unique]
}
Table loans {
id INTEGER [pk]
book_id INTEGER
borrower_id INTEGER
loan_date TEXT [not null]
return_date TEXT
}
Ref: books.author_id > authors.id
Ref: loans.book_id > books.id
Ref: loans.borrower_id > borrowers.id
▴
|
| 129 |
+266.0s [+0.0s] |
tool_call |
Write - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/schema.dbml"
- content: Table authors {
id INTEGER [pk]
name TEXT [not null]
birth_year INTEGER
}
Table books {
id INTEGER [pk]
title TEXT [not null]
isbn TEXT [unique]
author_id INTEGER
}
Table borrowers {
…Table authors {
id INTEGER [pk]
name TEXT [not null]
birth_year INTEGER
}
Table books {
id INTEGER [pk]
title TEXT [not null]
isbn TEXT [unique]
author_id INTEGER
}
Table borrowers {
id INTEGER [pk]
name TEXT [not null]
email TEXT [unique]
}
Table loans {
id INTEGER [pk]
book_id INTEGER
borrower_id INTEGER
loan_date TEXT [not null]
return_date TEXT
}
Ref: books.author_id > authors.id
Ref: loans.book_id > books.id
Ref: loans.borrower_id > borrowers.id
▴
|
| 130 |
+266.0s [+0.0s] |
tool_result |
PASS |
| 131 |
+266.0s [+0.0s] |
tool_result |
PASS |
| 132 |
+269.0s [+3.0s] |
tool_call |
TodoWrite - todos: [8 items]
- [0] {content, status, activeForm}
- content: "Create schema.dbml (data model)"
- status: "completed"
- activeForm: "Creating schema.dbml"
- [1] {content, status, activeForm}
- content: "Create generator/parser.py (DBML parser)"
- status: "in_progress"
- activeForm: "Creating generator/parser.py"
- [2] {content, status, activeForm}
- content: "Create generator/helpers.py (data reshaper)"
- status: "pending"
- activeForm: "Creating generator/helpers.py"
- [3] {content, status, activeForm}
- content: "Create templates/schema.py.jinja2 (Jinja2 template)"
- status: "pending"
- activeForm: "Creating templates/schema.py.jinja2"
- [4] {content, status, activeForm}
- content: "Create generator/generate.py (driver script)"
- status: "pending"
- activeForm: "Creating generator/generate.py"
- [5] {content, status, activeForm}
- content: "Run generator to produce generated/schema.py"
- status: "pending"
- activeForm: "Running generator"
- [6] {content, status, activeForm}
- content: "Create library.py (consumer program)"
- status: "pending"
- activeForm: "Creating library.py"
- [7] {content, status, activeForm}
- content: "Run library.py to verify output"
- status: "pending"
- activeForm: "Running library.py"
|
| 133 |
+269.0s [+0.0s] |
tool_call |
TodoWrite - todos: [8 items]
- [0] {content, status, activeForm}
- content: "Create schema.dbml (data model)"
- status: "completed"
- activeForm: "Creating schema.dbml"
- [1] {content, status, activeForm}
- content: "Create generator/parser.py (DBML parser)"
- status: "in_progress"
- activeForm: "Creating generator/parser.py"
- [2] {content, status, activeForm}
- content: "Create generator/helpers.py (data reshaper)"
- status: "pending"
- activeForm: "Creating generator/helpers.py"
- [3] {content, status, activeForm}
- content: "Create templates/schema.py.jinja2 (Jinja2 template)"
- status: "pending"
- activeForm: "Creating templates/schema.py.jinja2"
- [4] {content, status, activeForm}
- content: "Create generator/generate.py (driver script)"
- status: "pending"
- activeForm: "Creating generator/generate.py"
- [5] {content, status, activeForm}
- content: "Run generator to produce generated/schema.py"
- status: "pending"
- activeForm: "Running generator"
- [6] {content, status, activeForm}
- content: "Create library.py (consumer program)"
- status: "pending"
- activeForm: "Creating library.py"
- [7] {content, status, activeForm}
- content: "Run library.py to verify output"
- status: "pending"
- activeForm: "Running library.py"
|
| 134 |
+269.0s [+0.0s] |
tool_result |
PASS |
| 135 |
+269.0s [+0.0s] |
tool_result |
PASS |
| 136 |
+271.0s [+2.0s] |
tool_call |
Bash - command: "mkdir -p /tmp/pytest-sandbox/test_library_generator_with_sk0/project/generator"
- description: "Create generator package directory"
|
| 137 |
+271.0s [+0.0s] |
tool_call |
Bash - command: "mkdir -p /tmp/pytest-sandbox/test_library_generator_with_sk0/project/generator"
- description: "Create generator package directory"
|
| 138 |
+271.0s [+0.0s] |
tool_result |
PASS |
| 139 |
+271.0s [+0.0s] |
tool_result |
PASS |
| 140 |
+274.0s [+3.0s] |
tool_call |
Write - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/generator/__init__.py"
- content: ""
|
| 141 |
+274.0s [+0.0s] |
tool_call |
Write - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/generator/__init__.py"
- content: ""
|
| 142 |
+274.0s [+0.0s] |
tool_result |
PASS |
| 143 |
+274.0s [+0.0s] |
tool_result |
PASS |
| 144 |
+295.0s [+21.0s] |
tool_call |
Write - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/generator/parser.py"
- content: """
DBML parser — reads a DBML schema file and returns a structured dict.
Handles the subset used by this project:
- Table blocks with bracket-syntax column constraints
- Ref: declarations using …"""
DBML parser — reads a DBML schema file and returns a structured dict.
Handles the subset used by this project:
- Table blocks with bracket-syntax column constraints
- Ref: declarations using the > (many-to-one) notation
Public interface
----------------
parse_dbml(filepath: str) -> dict
{
"tables": [
{
"name": str,
"columns": [
{
"name": str,
"type": str,
"pk": bool,
"not_null": bool,
"unique": bool,
"nullable": bool, # derived: not (pk or not_null)
},
...
],
"pk_columns": [str, ...],
},
...
],
"refs": [
{
"from_table": str,
"from_col": str,
"to_table": str,
"to_col": str,
},
...
],
}
"""
import re
# Matches: Table <name> {
_TABLE_RE = re.compile(r"^Table\s+(\w+)\s*\{")
# Matches: <col_name> <TYPE> [constraints] (constraints bracket is optional)
_COL_RE = re.compile(r"^\s*(\w+)\s+(\w+)(?:\s+\[([^\]]*)\])?\s*$")
# Matches: Ref: <from_table>.<from_col> > <to_table>.<to_col>
_REF_RE = re.compile(r"^Ref:\s*(\w+)\.(\w+)\s*>\s*(\w+)\.(\w+)")
def _parse_constraints(raw: str | None) -> dict:
"""
Parse the bracket content of a DBML column definition.
Input: "pk, not null" | "unique" | None
Output: {"pk": bool, "not_null": bool, "unique": bool}
"""
result = {"pk": False, "not_null": False, "unique": False}
if not raw:
return result
for token in raw.split(","):
token = token.strip().lower()
if token == "pk":
result["pk"] = True
elif token == "not null":
result["not_null"] = True
elif token == "unique":
result["unique"] = True
# unknown tokens are silently ignored (future-proofing)
return result
def parse_dbml(filepath: str) -> dict:
"""
Read *filepath* and return the structured schema dict described in the
module docstring.
Raises ValueError with the offending line number if a column definition
cannot be parsed while inside a Table block.
"""
tables: list[dict] = []
refs: list[dict] = []
# Parser state
in_table = False
current_table: dict = {}
with open(filepath, encoding="utf-8") as fh:
lines = fh.readlines()
for lineno, raw_line in enumerate(lines, start=1):
line = raw_line.strip()
# Skip blank lines and comment lines
if not line or line.startswith("//"):
continue
if not in_table:
# ── Look for Table block opening ─────────────────────────────
m = _TABLE_RE.match(line)
if m:
in_table = True
current_table = {
"name": m.group(1),
"columns": [],
"pk_columns": [],
}
continue
# ── Look for Ref declaration ─────────────────────────────────
m = _REF_RE.match(line)
if m:
refs.append(
{
"from_table": m.group(1),
"from_col": m.group(2),
"to_table": m.group(3),
"to_col": m.group(4),
}
)
continue
else:
# Inside a Table block
if line == "}":
in_table = False
tables.append(current_table)
current_table = {}
continue
m = _COL_RE.match(line)
if not m:
raise ValueError(
f"{filepath}:{lineno}: cannot parse column definition: {line!r}"
)
col_name = m.group(1)
col_type = m.group(2).upper()
constraints = _parse_constraints(m.group(3))
# A PK column is always NOT NULL even when not explicitly stated
if constraints["pk"]:
constraints["not_null"] = True
nullable = not (constraints["pk"] or constraints["not_null"])
col = {
"name": col_name,
"type": col_type,
"pk": constraints["pk"],
"not_null": constraints["not_null"],
"unique": constraints["unique"],
"nullable": nullable,
}
current_table["columns"].append(col)
if constraints["pk"]:
current_table["pk_columns"].append(col_name)
if in_table:
raise ValueError(f"{filepath}: unterminated Table block (missing closing '}}')")
return {"tables": tables, "refs": refs}
▴
|
| 145 |
+296.0s [+1.0s] |
tool_call |
Write - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/generator/parser.py"
- content: """
DBML parser — reads a DBML schema file and returns a structured dict.
Handles the subset used by this project:
- Table blocks with bracket-syntax column constraints
- Ref: declarations using …"""
DBML parser — reads a DBML schema file and returns a structured dict.
Handles the subset used by this project:
- Table blocks with bracket-syntax column constraints
- Ref: declarations using the > (many-to-one) notation
Public interface
----------------
parse_dbml(filepath: str) -> dict
{
"tables": [
{
"name": str,
"columns": [
{
"name": str,
"type": str,
"pk": bool,
"not_null": bool,
"unique": bool,
"nullable": bool, # derived: not (pk or not_null)
},
...
],
"pk_columns": [str, ...],
},
...
],
"refs": [
{
"from_table": str,
"from_col": str,
"to_table": str,
"to_col": str,
},
...
],
}
"""
import re
# Matches: Table <name> {
_TABLE_RE = re.compile(r"^Table\s+(\w+)\s*\{")
# Matches: <col_name> <TYPE> [constraints] (constraints bracket is optional)
_COL_RE = re.compile(r"^\s*(\w+)\s+(\w+)(?:\s+\[([^\]]*)\])?\s*$")
# Matches: Ref: <from_table>.<from_col> > <to_table>.<to_col>
_REF_RE = re.compile(r"^Ref:\s*(\w+)\.(\w+)\s*>\s*(\w+)\.(\w+)")
def _parse_constraints(raw: str | None) -> dict:
"""
Parse the bracket content of a DBML column definition.
Input: "pk, not null" | "unique" | None
Output: {"pk": bool, "not_null": bool, "unique": bool}
"""
result = {"pk": False, "not_null": False, "unique": False}
if not raw:
return result
for token in raw.split(","):
token = token.strip().lower()
if token == "pk":
result["pk"] = True
elif token == "not null":
result["not_null"] = True
elif token == "unique":
result["unique"] = True
# unknown tokens are silently ignored (future-proofing)
return result
def parse_dbml(filepath: str) -> dict:
"""
Read *filepath* and return the structured schema dict described in the
module docstring.
Raises ValueError with the offending line number if a column definition
cannot be parsed while inside a Table block.
"""
tables: list[dict] = []
refs: list[dict] = []
# Parser state
in_table = False
current_table: dict = {}
with open(filepath, encoding="utf-8") as fh:
lines = fh.readlines()
for lineno, raw_line in enumerate(lines, start=1):
line = raw_line.strip()
# Skip blank lines and comment lines
if not line or line.startswith("//"):
continue
if not in_table:
# ── Look for Table block opening ─────────────────────────────
m = _TABLE_RE.match(line)
if m:
in_table = True
current_table = {
"name": m.group(1),
"columns": [],
"pk_columns": [],
}
continue
# ── Look for Ref declaration ─────────────────────────────────
m = _REF_RE.match(line)
if m:
refs.append(
{
"from_table": m.group(1),
"from_col": m.group(2),
"to_table": m.group(3),
"to_col": m.group(4),
}
)
continue
else:
# Inside a Table block
if line == "}":
in_table = False
tables.append(current_table)
current_table = {}
continue
m = _COL_RE.match(line)
if not m:
raise ValueError(
f"{filepath}:{lineno}: cannot parse column definition: {line!r}"
)
col_name = m.group(1)
col_type = m.group(2).upper()
constraints = _parse_constraints(m.group(3))
# A PK column is always NOT NULL even when not explicitly stated
if constraints["pk"]:
constraints["not_null"] = True
nullable = not (constraints["pk"] or constraints["not_null"])
col = {
"name": col_name,
"type": col_type,
"pk": constraints["pk"],
"not_null": constraints["not_null"],
"unique": constraints["unique"],
"nullable": nullable,
}
current_table["columns"].append(col)
if constraints["pk"]:
current_table["pk_columns"].append(col_name)
if in_table:
raise ValueError(f"{filepath}: unterminated Table block (missing closing '}}')")
return {"tables": tables, "refs": refs}
▴
|
| 146 |
+296.0s [+0.0s] |
tool_result |
PASS |
| 147 |
+296.0s [+0.0s] |
tool_result |
PASS |
| 148 |
+301.0s [+5.0s] |
tool_call |
TodoWrite - todos: [8 items]
- [0] {content, status, activeForm}
- content: "Create schema.dbml (data model)"
- status: "completed"
- activeForm: "Creating schema.dbml"
- [1] {content, status, activeForm}
- content: "Create generator/parser.py (DBML parser)"
- status: "completed"
- activeForm: "Creating generator/parser.py"
- [2] {content, status, activeForm}
- content: "Create generator/helpers.py (data reshaper)"
- status: "in_progress"
- activeForm: "Creating generator/helpers.py"
- [3] {content, status, activeForm}
- content: "Create templates/schema.py.jinja2 (Jinja2 template)"
- status: "pending"
- activeForm: "Creating templates/schema.py.jinja2"
- [4] {content, status, activeForm}
- content: "Create generator/generate.py (driver script)"
- status: "pending"
- activeForm: "Creating generator/generate.py"
- [5] {content, status, activeForm}
- content: "Run generator to produce generated/schema.py"
- status: "pending"
- activeForm: "Running generator"
- [6] {content, status, activeForm}
- content: "Create library.py (consumer program)"
- status: "pending"
- activeForm: "Creating library.py"
- [7] {content, status, activeForm}
- content: "Run library.py to verify output"
- status: "pending"
- activeForm: "Running library.py"
|
| 149 |
+301.0s [+0.0s] |
tool_call |
TodoWrite - todos: [8 items]
- [0] {content, status, activeForm}
- content: "Create schema.dbml (data model)"
- status: "completed"
- activeForm: "Creating schema.dbml"
- [1] {content, status, activeForm}
- content: "Create generator/parser.py (DBML parser)"
- status: "completed"
- activeForm: "Creating generator/parser.py"
- [2] {content, status, activeForm}
- content: "Create generator/helpers.py (data reshaper)"
- status: "in_progress"
- activeForm: "Creating generator/helpers.py"
- [3] {content, status, activeForm}
- content: "Create templates/schema.py.jinja2 (Jinja2 template)"
- status: "pending"
- activeForm: "Creating templates/schema.py.jinja2"
- [4] {content, status, activeForm}
- content: "Create generator/generate.py (driver script)"
- status: "pending"
- activeForm: "Creating generator/generate.py"
- [5] {content, status, activeForm}
- content: "Run generator to produce generated/schema.py"
- status: "pending"
- activeForm: "Running generator"
- [6] {content, status, activeForm}
- content: "Create library.py (consumer program)"
- status: "pending"
- activeForm: "Creating library.py"
- [7] {content, status, activeForm}
- content: "Run library.py to verify output"
- status: "pending"
- activeForm: "Running library.py"
|
| 150 |
+301.0s [+0.0s] |
tool_result |
PASS |
| 151 |
+301.0s [+0.0s] |
tool_result |
PASS |
| 152 |
+318.0s [+17.0s] |
tool_call |
Write - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/generator/helpers.py"
- content: """
Helpers — reshape raw parser output into a Jinja2-ready context dict.
All data-transformation logic lives here; templates stay thin.
Public interface
----------------
prepare_context(parsed: dic…"""
Helpers — reshape raw parser output into a Jinja2-ready context dict.
All data-transformation logic lives here; templates stay thin.
Public interface
----------------
prepare_context(parsed: dict) -> dict
{
"tables": [
{
"name": str,
"columns": [
{
"name": str,
"sql_type": str, # SQLite affinity
"constraints": str, # inline SQL fragment, e.g. "PRIMARY KEY"
"nullable": bool,
},
...
],
"foreign_keys": [
{
"col": str, # column in this table
"ref_table": str, # referenced table
"ref_col": str, # referenced column
},
...
],
"col_names": [str, ...], # ordered column names for TABLES metadata
},
...
]
}
"""
# ── Type mapping ──────────────────────────────────────────────────────────────
_DBML_TO_SQLITE: dict[str, str] = {
"INTEGER": "INTEGER",
"TEXT": "TEXT",
"REAL": "REAL",
"BLOB": "BLOB",
"NUMERIC": "NUMERIC",
}
def _map_type(dbml_type: str) -> str:
"""Map a DBML column type to its SQLite type affinity."""
try:
return _DBML_TO_SQLITE[dbml_type.upper()]
except KeyError:
raise ValueError(
f"Unknown DBML type {dbml_type!r}. "
f"Supported types: {list(_DBML_TO_SQLITE)}"
)
# ── Constraint fragment ───────────────────────────────────────────────────────
def _build_constraint_fragment(col: dict) -> str:
"""
Build the inline SQL constraint string for a column.
Enforces SQLite ordering: PRIMARY KEY → NOT NULL → UNIQUE.
Returns an empty string when no constraints apply.
"""
parts: list[str] = []
if col["pk"]:
parts.append("PRIMARY KEY")
if col["not_null"] and not col["pk"]:
# PRIMARY KEY already implies NOT NULL in SQLite; avoid redundancy
parts.append("NOT NULL")
if col["unique"]:
parts.append("UNIQUE")
return " ".join(parts)
# ── Foreign-key lookup ────────────────────────────────────────────────────────
def _build_foreign_keys(table_name: str, refs: list[dict]) -> list[dict]:
"""
Return all FK entries for *table_name* derived from the global refs list.
Preserves the order in which Ref declarations appear in the DBML file.
"""
return [
{
"col": ref["from_col"],
"ref_table": ref["to_table"],
"ref_col": ref["to_col"],
}
for ref in refs
if ref["from_table"] == table_name
]
# ── Public entry point ────────────────────────────────────────────────────────
def prepare_context(parsed: dict) -> dict:
"""
Transform the dict returned by ``parser.parse_dbml()`` into the context
dict expected by the Jinja2 template.
"""
tables = []
for raw_table in parsed["tables"]:
columns = []
for col in raw_table["columns"]:
columns.append(
{
"name": col["name"],
"sql_type": _map_type(col["type"]),
"constraints": _build_constraint_fragment(col),
"nullable": col["nullable"],
}
)
foreign_keys = _build_foreign_keys(raw_table["name"], parsed["refs"])
col_names = [col["name"] for col in raw_table["columns"]]
tables.append(
{
"name": raw_table["name"],
"columns": columns,
"foreign_keys": foreign_keys,
"col_names": col_names,
}
)
return {"tables": tables}
▴
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Write - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/generator/helpers.py"
- content: """
Helpers — reshape raw parser output into a Jinja2-ready context dict.
All data-transformation logic lives here; templates stay thin.
Public interface
----------------
prepare_context(parsed: dic…"""
Helpers — reshape raw parser output into a Jinja2-ready context dict.
All data-transformation logic lives here; templates stay thin.
Public interface
----------------
prepare_context(parsed: dict) -> dict
{
"tables": [
{
"name": str,
"columns": [
{
"name": str,
"sql_type": str, # SQLite affinity
"constraints": str, # inline SQL fragment, e.g. "PRIMARY KEY"
"nullable": bool,
},
...
],
"foreign_keys": [
{
"col": str, # column in this table
"ref_table": str, # referenced table
"ref_col": str, # referenced column
},
...
],
"col_names": [str, ...], # ordered column names for TABLES metadata
},
...
]
}
"""
# ── Type mapping ──────────────────────────────────────────────────────────────
_DBML_TO_SQLITE: dict[str, str] = {
"INTEGER": "INTEGER",
"TEXT": "TEXT",
"REAL": "REAL",
"BLOB": "BLOB",
"NUMERIC": "NUMERIC",
}
def _map_type(dbml_type: str) -> str:
"""Map a DBML column type to its SQLite type affinity."""
try:
return _DBML_TO_SQLITE[dbml_type.upper()]
except KeyError:
raise ValueError(
f"Unknown DBML type {dbml_type!r}. "
f"Supported types: {list(_DBML_TO_SQLITE)}"
)
# ── Constraint fragment ───────────────────────────────────────────────────────
def _build_constraint_fragment(col: dict) -> str:
"""
Build the inline SQL constraint string for a column.
Enforces SQLite ordering: PRIMARY KEY → NOT NULL → UNIQUE.
Returns an empty string when no constraints apply.
"""
parts: list[str] = []
if col["pk"]:
parts.append("PRIMARY KEY")
if col["not_null"] and not col["pk"]:
# PRIMARY KEY already implies NOT NULL in SQLite; avoid redundancy
parts.append("NOT NULL")
if col["unique"]:
parts.append("UNIQUE")
return " ".join(parts)
# ── Foreign-key lookup ────────────────────────────────────────────────────────
def _build_foreign_keys(table_name: str, refs: list[dict]) -> list[dict]:
"""
Return all FK entries for *table_name* derived from the global refs list.
Preserves the order in which Ref declarations appear in the DBML file.
"""
return [
{
"col": ref["from_col"],
"ref_table": ref["to_table"],
"ref_col": ref["to_col"],
}
for ref in refs
if ref["from_table"] == table_name
]
# ── Public entry point ────────────────────────────────────────────────────────
def prepare_context(parsed: dict) -> dict:
"""
Transform the dict returned by ``parser.parse_dbml()`` into the context
dict expected by the Jinja2 template.
"""
tables = []
for raw_table in parsed["tables"]:
columns = []
for col in raw_table["columns"]:
columns.append(
{
"name": col["name"],
"sql_type": _map_type(col["type"]),
"constraints": _build_constraint_fragment(col),
"nullable": col["nullable"],
}
)
foreign_keys = _build_foreign_keys(raw_table["name"], parsed["refs"])
col_names = [col["name"] for col in raw_table["columns"]]
tables.append(
{
"name": raw_table["name"],
"columns": columns,
"foreign_keys": foreign_keys,
"col_names": col_names,
}
)
return {"tables": tables}
▴
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tool_call |
TodoWrite - todos: [8 items]
- [0] {content, status, activeForm}
- content: "Create schema.dbml (data model)"
- status: "completed"
- activeForm: "Creating schema.dbml"
- [1] {content, status, activeForm}
- content: "Create generator/parser.py (DBML parser)"
- status: "completed"
- activeForm: "Creating generator/parser.py"
- [2] {content, status, activeForm}
- content: "Create generator/helpers.py (data reshaper)"
- status: "completed"
- activeForm: "Creating generator/helpers.py"
- [3] {content, status, activeForm}
- content: "Create templates/schema.py.jinja2 (Jinja2 template)"
- status: "in_progress"
- activeForm: "Creating templates/schema.py.jinja2"
- [4] {content, status, activeForm}
- content: "Create generator/generate.py (driver script)"
- status: "pending"
- activeForm: "Creating generator/generate.py"
- [5] {content, status, activeForm}
- content: "Run generator to produce generated/schema.py"
- status: "pending"
- activeForm: "Running generator"
- [6] {content, status, activeForm}
- content: "Create library.py (consumer program)"
- status: "pending"
- activeForm: "Creating library.py"
- [7] {content, status, activeForm}
- content: "Run library.py to verify output"
- status: "pending"
- activeForm: "Running library.py"
|
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tool_call |
TodoWrite - todos: [8 items]
- [0] {content, status, activeForm}
- content: "Create schema.dbml (data model)"
- status: "completed"
- activeForm: "Creating schema.dbml"
- [1] {content, status, activeForm}
- content: "Create generator/parser.py (DBML parser)"
- status: "completed"
- activeForm: "Creating generator/parser.py"
- [2] {content, status, activeForm}
- content: "Create generator/helpers.py (data reshaper)"
- status: "completed"
- activeForm: "Creating generator/helpers.py"
- [3] {content, status, activeForm}
- content: "Create templates/schema.py.jinja2 (Jinja2 template)"
- status: "in_progress"
- activeForm: "Creating templates/schema.py.jinja2"
- [4] {content, status, activeForm}
- content: "Create generator/generate.py (driver script)"
- status: "pending"
- activeForm: "Creating generator/generate.py"
- [5] {content, status, activeForm}
- content: "Run generator to produce generated/schema.py"
- status: "pending"
- activeForm: "Running generator"
- [6] {content, status, activeForm}
- content: "Create library.py (consumer program)"
- status: "pending"
- activeForm: "Creating library.py"
- [7] {content, status, activeForm}
- content: "Run library.py to verify output"
- status: "pending"
- activeForm: "Running library.py"
|
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tool_call |
Bash - command: "mkdir -p /tmp/pytest-sandbox/test_library_generator_with_sk0/project/templates"
- description: "Create templates directory"
|
| 161 |
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tool_call |
Bash - command: "mkdir -p /tmp/pytest-sandbox/test_library_generator_with_sk0/project/templates"
- description: "Create templates directory"
|
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tool_call |
Write - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/templates/schema.py.jinja2"
- content: # GENERATED FILE — do not edit by hand.
# Source: schema.dbml
# Template: templates/schema.py.jinja2
# Regenerate: python generator/generate.py
import sqlite3
def create_tables(conn: sqlite3.Co…# GENERATED FILE — do not edit by hand.
# Source: schema.dbml
# Template: templates/schema.py.jinja2
# Regenerate: python generator/generate.py
import sqlite3
def create_tables(conn: sqlite3.Connection) -> None:
"""Create all tables defined in schema.dbml."""
cursor = conn.cursor()
cursor.executescript("""\
PRAGMA foreign_keys = ON;
{% for table in tables %}
CREATE TABLE IF NOT EXISTS {{ table.name }} (
{% for col in table.columns %}
{% if not loop.last or table.foreign_keys %}
{{ col.name }} {{ col.sql_type }}{% if col.constraints %} {{ col.constraints }}{% endif %},
{% else %}
{{ col.name }} {{ col.sql_type }}{% if col.constraints %} {{ col.constraints }}{% endif %}
{% endif %}
{% endfor %}
{% for fk in table.foreign_keys %}
{% if not loop.last %}
FOREIGN KEY ({{ fk.col }}) REFERENCES {{ fk.ref_table }}({{ fk.ref_col }}),
{% else %}
FOREIGN KEY ({{ fk.col }}) REFERENCES {{ fk.ref_table }}({{ fk.ref_col }})
{% endif %}
{% endfor %}
);
{% endfor %}
""")
conn.commit()
TABLES: dict[str, list[str]] = {
{% for table in tables %}
"{{ table.name }}": {{ table.col_names }},
{% endfor %}
}
▴
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| 165 |
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tool_call |
Write - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/templates/schema.py.jinja2"
- content: # GENERATED FILE — do not edit by hand.
# Source: schema.dbml
# Template: templates/schema.py.jinja2
# Regenerate: python generator/generate.py
import sqlite3
def create_tables(conn: sqlite3.Co…# GENERATED FILE — do not edit by hand.
# Source: schema.dbml
# Template: templates/schema.py.jinja2
# Regenerate: python generator/generate.py
import sqlite3
def create_tables(conn: sqlite3.Connection) -> None:
"""Create all tables defined in schema.dbml."""
cursor = conn.cursor()
cursor.executescript("""\
PRAGMA foreign_keys = ON;
{% for table in tables %}
CREATE TABLE IF NOT EXISTS {{ table.name }} (
{% for col in table.columns %}
{% if not loop.last or table.foreign_keys %}
{{ col.name }} {{ col.sql_type }}{% if col.constraints %} {{ col.constraints }}{% endif %},
{% else %}
{{ col.name }} {{ col.sql_type }}{% if col.constraints %} {{ col.constraints }}{% endif %}
{% endif %}
{% endfor %}
{% for fk in table.foreign_keys %}
{% if not loop.last %}
FOREIGN KEY ({{ fk.col }}) REFERENCES {{ fk.ref_table }}({{ fk.ref_col }}),
{% else %}
FOREIGN KEY ({{ fk.col }}) REFERENCES {{ fk.ref_table }}({{ fk.ref_col }})
{% endif %}
{% endfor %}
);
{% endfor %}
""")
conn.commit()
TABLES: dict[str, list[str]] = {
{% for table in tables %}
"{{ table.name }}": {{ table.col_names }},
{% endfor %}
}
▴
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| 166 |
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tool_result |
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tool_call |
TodoWrite - todos: [8 items]
- [0] {content, status, activeForm}
- content: "Create schema.dbml (data model)"
- status: "completed"
- activeForm: "Creating schema.dbml"
- [1] {content, status, activeForm}
- content: "Create generator/parser.py (DBML parser)"
- status: "completed"
- activeForm: "Creating generator/parser.py"
- [2] {content, status, activeForm}
- content: "Create generator/helpers.py (data reshaper)"
- status: "completed"
- activeForm: "Creating generator/helpers.py"
- [3] {content, status, activeForm}
- content: "Create templates/schema.py.jinja2 (Jinja2 template)"
- status: "completed"
- activeForm: "Creating templates/schema.py.jinja2"
- [4] {content, status, activeForm}
- content: "Create generator/generate.py (driver script)"
- status: "in_progress"
- activeForm: "Creating generator/generate.py"
- [5] {content, status, activeForm}
- content: "Run generator to produce generated/schema.py"
- status: "pending"
- activeForm: "Running generator"
- [6] {content, status, activeForm}
- content: "Create library.py (consumer program)"
- status: "pending"
- activeForm: "Creating library.py"
- [7] {content, status, activeForm}
- content: "Run library.py to verify output"
- status: "pending"
- activeForm: "Running library.py"
|
| 169 |
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tool_call |
TodoWrite - todos: [8 items]
- [0] {content, status, activeForm}
- content: "Create schema.dbml (data model)"
- status: "completed"
- activeForm: "Creating schema.dbml"
- [1] {content, status, activeForm}
- content: "Create generator/parser.py (DBML parser)"
- status: "completed"
- activeForm: "Creating generator/parser.py"
- [2] {content, status, activeForm}
- content: "Create generator/helpers.py (data reshaper)"
- status: "completed"
- activeForm: "Creating generator/helpers.py"
- [3] {content, status, activeForm}
- content: "Create templates/schema.py.jinja2 (Jinja2 template)"
- status: "completed"
- activeForm: "Creating templates/schema.py.jinja2"
- [4] {content, status, activeForm}
- content: "Create generator/generate.py (driver script)"
- status: "in_progress"
- activeForm: "Creating generator/generate.py"
- [5] {content, status, activeForm}
- content: "Run generator to produce generated/schema.py"
- status: "pending"
- activeForm: "Running generator"
- [6] {content, status, activeForm}
- content: "Create library.py (consumer program)"
- status: "pending"
- activeForm: "Creating library.py"
- [7] {content, status, activeForm}
- content: "Run library.py to verify output"
- status: "pending"
- activeForm: "Running library.py"
|
| 170 |
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tool_result |
PASS |
| 171 |
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tool_result |
PASS |
| 172 |
+344.0s [+9.0s] |
tool_call |
Write - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/generator/generate.py"
- content: #!/usr/bin/env python3
"""
Driver script — connects all generator pipeline stages.
Pipeline:
schema.dbml → parser → helpers → Jinja2 template → generated/schema.py
Usage (run from the pr…#!/usr/bin/env python3
"""
Driver script — connects all generator pipeline stages.
Pipeline:
schema.dbml → parser → helpers → Jinja2 template → generated/schema.py
Usage (run from the project root):
python generator/generate.py
"""
import pathlib
import sys
import jinja2
# Allow running as a script from the project root: python generator/generate.py
_PROJECT_ROOT = pathlib.Path(__file__).resolve().parent.parent
sys.path.insert(0, str(_PROJECT_ROOT))
from generator.helpers import prepare_context # noqa: E402
from generator.parser import parse_dbml # noqa: E402
# ── Paths ─────────────────────────────────────────────────────────────────────
SCHEMA_DBML = _PROJECT_ROOT / "schema.dbml"
TEMPLATE_DIR = _PROJECT_ROOT / "templates"
TEMPLATE_NAME = "schema.py.jinja2"
OUTPUT_FILE = _PROJECT_ROOT / "generated" / "schema.py"
def main() -> None:
# ── Stage 1: Parse ────────────────────────────────────────────────────────
parsed = parse_dbml(str(SCHEMA_DBML))
# ── Stage 2: Reshape for template ─────────────────────────────────────────
context = prepare_context(parsed)
# ── Stage 3: Render ───────────────────────────────────────────────────────
env = jinja2.Environment(
loader=jinja2.FileSystemLoader(str(TEMPLATE_DIR)),
trim_blocks=True, # strip newline after {% ... %} block tags
lstrip_blocks=True, # strip leading whitespace before {% ... %} tags
undefined=jinja2.StrictUndefined, # fail loudly on missing variables
keep_trailing_newline=True,
)
template = env.get_template(TEMPLATE_NAME)
output = template.render(**context)
# ── Stage 4: Write ────────────────────────────────────────────────────────
OUTPUT_FILE.parent.mkdir(parents=True, exist_ok=True)
OUTPUT_FILE.write_text(output, encoding="utf-8")
print(f"Generated: {OUTPUT_FILE.relative_to(_PROJECT_ROOT)}")
if __name__ == "__main__":
main()
▴
|
| 173 |
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tool_call |
Write - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/generator/generate.py"
- content: #!/usr/bin/env python3
"""
Driver script — connects all generator pipeline stages.
Pipeline:
schema.dbml → parser → helpers → Jinja2 template → generated/schema.py
Usage (run from the pr…#!/usr/bin/env python3
"""
Driver script — connects all generator pipeline stages.
Pipeline:
schema.dbml → parser → helpers → Jinja2 template → generated/schema.py
Usage (run from the project root):
python generator/generate.py
"""
import pathlib
import sys
import jinja2
# Allow running as a script from the project root: python generator/generate.py
_PROJECT_ROOT = pathlib.Path(__file__).resolve().parent.parent
sys.path.insert(0, str(_PROJECT_ROOT))
from generator.helpers import prepare_context # noqa: E402
from generator.parser import parse_dbml # noqa: E402
# ── Paths ─────────────────────────────────────────────────────────────────────
SCHEMA_DBML = _PROJECT_ROOT / "schema.dbml"
TEMPLATE_DIR = _PROJECT_ROOT / "templates"
TEMPLATE_NAME = "schema.py.jinja2"
OUTPUT_FILE = _PROJECT_ROOT / "generated" / "schema.py"
def main() -> None:
# ── Stage 1: Parse ────────────────────────────────────────────────────────
parsed = parse_dbml(str(SCHEMA_DBML))
# ── Stage 2: Reshape for template ─────────────────────────────────────────
context = prepare_context(parsed)
# ── Stage 3: Render ───────────────────────────────────────────────────────
env = jinja2.Environment(
loader=jinja2.FileSystemLoader(str(TEMPLATE_DIR)),
trim_blocks=True, # strip newline after {% ... %} block tags
lstrip_blocks=True, # strip leading whitespace before {% ... %} tags
undefined=jinja2.StrictUndefined, # fail loudly on missing variables
keep_trailing_newline=True,
)
template = env.get_template(TEMPLATE_NAME)
output = template.render(**context)
# ── Stage 4: Write ────────────────────────────────────────────────────────
OUTPUT_FILE.parent.mkdir(parents=True, exist_ok=True)
OUTPUT_FILE.write_text(output, encoding="utf-8")
print(f"Generated: {OUTPUT_FILE.relative_to(_PROJECT_ROOT)}")
if __name__ == "__main__":
main()
▴
|
| 174 |
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tool_result |
PASS |
| 176 |
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tool_call |
TodoWrite - todos: [8 items]
- [0] {content, status, activeForm}
- content: "Create schema.dbml (data model)"
- status: "completed"
- activeForm: "Creating schema.dbml"
- [1] {content, status, activeForm}
- content: "Create generator/parser.py (DBML parser)"
- status: "completed"
- activeForm: "Creating generator/parser.py"
- [2] {content, status, activeForm}
- content: "Create generator/helpers.py (data reshaper)"
- status: "completed"
- activeForm: "Creating generator/helpers.py"
- [3] {content, status, activeForm}
- content: "Create templates/schema.py.jinja2 (Jinja2 template)"
- status: "completed"
- activeForm: "Creating templates/schema.py.jinja2"
- [4] {content, status, activeForm}
- content: "Create generator/generate.py (driver script)"
- status: "completed"
- activeForm: "Creating generator/generate.py"
- [5] {content, status, activeForm}
- content: "Run generator to produce generated/schema.py"
- status: "in_progress"
- activeForm: "Running generator"
- [6] {content, status, activeForm}
- content: "Create library.py (consumer program)"
- status: "pending"
- activeForm: "Creating library.py"
- [7] {content, status, activeForm}
- content: "Run library.py to verify output"
- status: "pending"
- activeForm: "Running library.py"
|
| 177 |
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tool_call |
TodoWrite - todos: [8 items]
- [0] {content, status, activeForm}
- content: "Create schema.dbml (data model)"
- status: "completed"
- activeForm: "Creating schema.dbml"
- [1] {content, status, activeForm}
- content: "Create generator/parser.py (DBML parser)"
- status: "completed"
- activeForm: "Creating generator/parser.py"
- [2] {content, status, activeForm}
- content: "Create generator/helpers.py (data reshaper)"
- status: "completed"
- activeForm: "Creating generator/helpers.py"
- [3] {content, status, activeForm}
- content: "Create templates/schema.py.jinja2 (Jinja2 template)"
- status: "completed"
- activeForm: "Creating templates/schema.py.jinja2"
- [4] {content, status, activeForm}
- content: "Create generator/generate.py (driver script)"
- status: "completed"
- activeForm: "Creating generator/generate.py"
- [5] {content, status, activeForm}
- content: "Run generator to produce generated/schema.py"
- status: "in_progress"
- activeForm: "Running generator"
- [6] {content, status, activeForm}
- content: "Create library.py (consumer program)"
- status: "pending"
- activeForm: "Creating library.py"
- [7] {content, status, activeForm}
- content: "Run library.py to verify output"
- status: "pending"
- activeForm: "Running library.py"
|
| 178 |
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PASS |
| 179 |
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tool_result |
PASS |
| 180 |
+350.0s [+2.0s] |
tool_call |
Bash - command: "python generator/generate.py"
- description: "Run the DBML generator to produce generated/schema.py"
|
| 181 |
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tool_call |
Bash - command: "python generator/generate.py"
- description: "Run the DBML generator to produce generated/schema.py"
|
| 182 |
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tool_result |
PASS |
| 183 |
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tool_result |
PASS |
| 184 |
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tool_call |
Bash - command: "cat -n /tmp/pytest-sandbox/test_library_generator_with_sk0/project/generated/schema.py"
- description: "Inspect generated/schema.py output"
|
| 185 |
+352.0s [+0.0s] |
tool_call |
Bash - command: "cat -n /tmp/pytest-sandbox/test_library_generator_with_sk0/project/generated/schema.py"
- description: "Inspect generated/schema.py output"
|
| 186 |
+352.0s [+0.0s] |
tool_result |
PASS |
| 187 |
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tool_result |
PASS |
| 188 |
+411.0s [+59.0s] |
tool_call |
Write - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/templates/schema.py.jinja2"
- content: # GENERATED FILE — do not edit by hand.
# Source: schema.dbml
# Template: templates/schema.py.jinja2
# Regenerate: python generator/generate.py
import sqlite3
def create_tables(conn: sqlite3.Co…# GENERATED FILE — do not edit by hand.
# Source: schema.dbml
# Template: templates/schema.py.jinja2
# Regenerate: python generator/generate.py
import sqlite3
def create_tables(conn: sqlite3.Connection) -> None:
"""Create all tables defined in schema.dbml."""
cursor = conn.cursor()
cursor.executescript("""\
PRAGMA foreign_keys = ON;
{% for table in tables %}
CREATE TABLE IF NOT EXISTS {{ table.name }} (
{% for col in table.columns %}
{% set sep = "," if (not loop.last or table.foreign_keys) else "" %}
{{ col.name }} {{ col.sql_type }}{% if col.constraints %} {{ col.constraints }}{% endif %}{{ sep }}
{% endfor %}
{% for fk in table.foreign_keys %}
{% set sep = "," if not loop.last else "" %}
FOREIGN KEY ({{ fk.col }}) REFERENCES {{ fk.ref_table }}({{ fk.ref_col }}){{ sep }}
{% endfor %}
);
{% endfor %}
""")
conn.commit()
TABLES: dict[str, list[str]] = {
{% for table in tables %}
"{{ table.name }}": {{ table.col_names }},
{% endfor %}
}
▴
|
| 189 |
+411.0s [+0.0s] |
tool_call |
Write - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/templates/schema.py.jinja2"
- content: # GENERATED FILE — do not edit by hand.
# Source: schema.dbml
# Template: templates/schema.py.jinja2
# Regenerate: python generator/generate.py
import sqlite3
def create_tables(conn: sqlite3.Co…# GENERATED FILE — do not edit by hand.
# Source: schema.dbml
# Template: templates/schema.py.jinja2
# Regenerate: python generator/generate.py
import sqlite3
def create_tables(conn: sqlite3.Connection) -> None:
"""Create all tables defined in schema.dbml."""
cursor = conn.cursor()
cursor.executescript("""\
PRAGMA foreign_keys = ON;
{% for table in tables %}
CREATE TABLE IF NOT EXISTS {{ table.name }} (
{% for col in table.columns %}
{% set sep = "," if (not loop.last or table.foreign_keys) else "" %}
{{ col.name }} {{ col.sql_type }}{% if col.constraints %} {{ col.constraints }}{% endif %}{{ sep }}
{% endfor %}
{% for fk in table.foreign_keys %}
{% set sep = "," if not loop.last else "" %}
FOREIGN KEY ({{ fk.col }}) REFERENCES {{ fk.ref_table }}({{ fk.ref_col }}){{ sep }}
{% endfor %}
);
{% endfor %}
""")
conn.commit()
TABLES: dict[str, list[str]] = {
{% for table in tables %}
"{{ table.name }}": {{ table.col_names }},
{% endfor %}
}
▴
|
| 190 |
+411.0s [+0.0s] |
tool_result |
PASS |
| 191 |
+411.0s [+0.0s] |
tool_result |
PASS |
| 192 |
+413.0s [+2.0s] |
tool_call |
Bash - command: "python generator/generate.py && echo "---" && cat -n generated/schema.py"
- description: "Regenerate and inspect schema.py"
|
| 193 |
+413.0s [+0.0s] |
tool_call |
Bash - command: "python generator/generate.py && echo "---" && cat -n generated/schema.py"
- description: "Regenerate and inspect schema.py"
|
| 194 |
+413.0s [+0.0s] |
tool_result |
PASS |
| 195 |
+413.0s [+0.0s] |
tool_result |
PASS |
| 196 |
+419.0s [+6.0s] |
tool_call |
TodoWrite - todos: [8 items]
- [0] {content, status, activeForm}
- content: "Create schema.dbml (data model)"
- status: "completed"
- activeForm: "Creating schema.dbml"
- [1] {content, status, activeForm}
- content: "Create generator/parser.py (DBML parser)"
- status: "completed"
- activeForm: "Creating generator/parser.py"
- [2] {content, status, activeForm}
- content: "Create generator/helpers.py (data reshaper)"
- status: "completed"
- activeForm: "Creating generator/helpers.py"
- [3] {content, status, activeForm}
- content: "Create templates/schema.py.jinja2 (Jinja2 template)"
- status: "completed"
- activeForm: "Creating templates/schema.py.jinja2"
- [4] {content, status, activeForm}
- content: "Create generator/generate.py (driver script)"
- status: "completed"
- activeForm: "Creating generator/generate.py"
- [5] {content, status, activeForm}
- content: "Run generator to produce generated/schema.py"
- status: "completed"
- activeForm: "Running generator"
- [6] {content, status, activeForm}
- content: "Create library.py (consumer program)"
- status: "in_progress"
- activeForm: "Creating library.py"
- [7] {content, status, activeForm}
- content: "Run library.py to verify output"
- status: "pending"
- activeForm: "Running library.py"
|
| 197 |
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tool_call |
TodoWrite - todos: [8 items]
- [0] {content, status, activeForm}
- content: "Create schema.dbml (data model)"
- status: "completed"
- activeForm: "Creating schema.dbml"
- [1] {content, status, activeForm}
- content: "Create generator/parser.py (DBML parser)"
- status: "completed"
- activeForm: "Creating generator/parser.py"
- [2] {content, status, activeForm}
- content: "Create generator/helpers.py (data reshaper)"
- status: "completed"
- activeForm: "Creating generator/helpers.py"
- [3] {content, status, activeForm}
- content: "Create templates/schema.py.jinja2 (Jinja2 template)"
- status: "completed"
- activeForm: "Creating templates/schema.py.jinja2"
- [4] {content, status, activeForm}
- content: "Create generator/generate.py (driver script)"
- status: "completed"
- activeForm: "Creating generator/generate.py"
- [5] {content, status, activeForm}
- content: "Run generator to produce generated/schema.py"
- status: "completed"
- activeForm: "Running generator"
- [6] {content, status, activeForm}
- content: "Create library.py (consumer program)"
- status: "in_progress"
- activeForm: "Creating library.py"
- [7] {content, status, activeForm}
- content: "Run library.py to verify output"
- status: "pending"
- activeForm: "Running library.py"
|
| 198 |
+419.0s [+0.0s] |
tool_result |
PASS |
| 199 |
+419.0s [+0.0s] |
tool_result |
PASS |
| 200 |
+437.0s [+18.0s] |
tool_call |
Write - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/library.py"
- content: #!/usr/bin/env python3
"""
library.py — Book-library demo program.
Consumes generated/schema.py (produced by running: python generator/generate.py).
Does NOT import from the generator package — only …#!/usr/bin/env python3
"""
library.py — Book-library demo program.
Consumes generated/schema.py (produced by running: python generator/generate.py).
Does NOT import from the generator package — only from the generated output.
Behaviour
---------
1. Open (or create) library.db
2. Create all tables via the generated create_tables()
3. Seed 3 authors, 5 books, 2 borrowers, and 2 loans
4. Print a report of all active (unreturned) loans
"""
import sqlite3
import pathlib
import sys
# ── Locate project root so imports work regardless of cwd ─────────────────────
_ROOT = pathlib.Path(__file__).resolve().parent
sys.path.insert(0, str(_ROOT))
from generated.schema import create_tables # noqa: E402 (generated file)
DB_PATH = _ROOT / "library.db"
# ── Seed data ─────────────────────────────────────────────────────────────────
def seed_data(conn: sqlite3.Connection) -> None:
"""Insert sample data. INSERT OR IGNORE makes this idempotent."""
cur = conn.cursor()
# 3 authors
cur.executemany(
"INSERT OR IGNORE INTO authors (id, name, birth_year) VALUES (?, ?, ?)",
[
(1, "George Orwell", 1903),
(2, "Ursula K. Le Guin", 1929),
(3, "Frank Herbert", 1920),
],
)
# 5 books
cur.executemany(
"INSERT OR IGNORE INTO books (id, title, isbn, author_id) VALUES (?, ?, ?, ?)",
[
(1, "Nineteen Eighty-Four", "978-0451524935", 1),
(2, "Animal Farm", "978-0451526342", 1),
(3, "The Left Hand of Darkness", "978-0441478125", 2),
(4, "Dune", "978-0441013593", 3),
(5, "The Dispossessed", "978-0061054884", 2),
],
)
# 2 borrowers
cur.executemany(
"INSERT OR IGNORE INTO borrowers (id, name, email) VALUES (?, ?, ?)",
[
(1, "Alice Smith", "alice@example.com"),
(2, "Bob Jones", "bob@example.com"),
],
)
# 2 loans — one returned, one active
cur.executemany(
"INSERT OR IGNORE INTO loans "
"(id, book_id, borrower_id, loan_date, return_date) VALUES (?, ?, ?, ?, ?)",
[
(1, 1, 1, "2026-03-01", "2026-03-15"), # Alice returned Nineteen Eighty-Four
(2, 4, 2, "2026-03-20", None), # Bob has Dune — still active
],
)
conn.commit()
# ── Report ────────────────────────────────────────────────────────────────────
def print_active_loans(conn: sqlite3.Connection) -> None:
"""Print book title and borrower name for every unreturned loan."""
cur = conn.cursor()
cur.execute(
"""
SELECT books.title, borrowers.name, loans.loan_date
FROM loans
JOIN books ON loans.book_id = books.id
JOIN borrowers ON loans.borrower_id = borrowers.id
WHERE loans.return_date IS NULL
ORDER BY books.title
"""
)
rows = cur.fetchall()
print("Active Loans")
print("=" * 44)
if not rows:
print(" (none)")
else:
for title, borrower, loan_date in rows:
print(f" {title}")
print(f" Borrower : {borrower}")
print(f" Since : {loan_date}")
print("=" * 44)
# ── Entry point ───────────────────────────────────────────────────────────────
def main() -> None:
conn = sqlite3.connect(DB_PATH)
conn.execute("PRAGMA foreign_keys = ON")
create_tables(conn)
seed_data(conn)
print_active_loans(conn)
conn.close()
if __name__ == "__main__":
main()
▴
|
| 201 |
+437.0s [+0.0s] |
tool_call |
Write - file_path: "/tmp/pytest-sandbox/test_library_generator_with_sk0/project/library.py"
- content: #!/usr/bin/env python3
"""
library.py — Book-library demo program.
Consumes generated/schema.py (produced by running: python generator/generate.py).
Does NOT import from the generator package — only …#!/usr/bin/env python3
"""
library.py — Book-library demo program.
Consumes generated/schema.py (produced by running: python generator/generate.py).
Does NOT import from the generator package — only from the generated output.
Behaviour
---------
1. Open (or create) library.db
2. Create all tables via the generated create_tables()
3. Seed 3 authors, 5 books, 2 borrowers, and 2 loans
4. Print a report of all active (unreturned) loans
"""
import sqlite3
import pathlib
import sys
# ── Locate project root so imports work regardless of cwd ─────────────────────
_ROOT = pathlib.Path(__file__).resolve().parent
sys.path.insert(0, str(_ROOT))
from generated.schema import create_tables # noqa: E402 (generated file)
DB_PATH = _ROOT / "library.db"
# ── Seed data ─────────────────────────────────────────────────────────────────
def seed_data(conn: sqlite3.Connection) -> None:
"""Insert sample data. INSERT OR IGNORE makes this idempotent."""
cur = conn.cursor()
# 3 authors
cur.executemany(
"INSERT OR IGNORE INTO authors (id, name, birth_year) VALUES (?, ?, ?)",
[
(1, "George Orwell", 1903),
(2, "Ursula K. Le Guin", 1929),
(3, "Frank Herbert", 1920),
],
)
# 5 books
cur.executemany(
"INSERT OR IGNORE INTO books (id, title, isbn, author_id) VALUES (?, ?, ?, ?)",
[
(1, "Nineteen Eighty-Four", "978-0451524935", 1),
(2, "Animal Farm", "978-0451526342", 1),
(3, "The Left Hand of Darkness", "978-0441478125", 2),
(4, "Dune", "978-0441013593", 3),
(5, "The Dispossessed", "978-0061054884", 2),
],
)
# 2 borrowers
cur.executemany(
"INSERT OR IGNORE INTO borrowers (id, name, email) VALUES (?, ?, ?)",
[
(1, "Alice Smith", "alice@example.com"),
(2, "Bob Jones", "bob@example.com"),
],
)
# 2 loans — one returned, one active
cur.executemany(
"INSERT OR IGNORE INTO loans "
"(id, book_id, borrower_id, loan_date, return_date) VALUES (?, ?, ?, ?, ?)",
[
(1, 1, 1, "2026-03-01", "2026-03-15"), # Alice returned Nineteen Eighty-Four
(2, 4, 2, "2026-03-20", None), # Bob has Dune — still active
],
)
conn.commit()
# ── Report ────────────────────────────────────────────────────────────────────
def print_active_loans(conn: sqlite3.Connection) -> None:
"""Print book title and borrower name for every unreturned loan."""
cur = conn.cursor()
cur.execute(
"""
SELECT books.title, borrowers.name, loans.loan_date
FROM loans
JOIN books ON loans.book_id = books.id
JOIN borrowers ON loans.borrower_id = borrowers.id
WHERE loans.return_date IS NULL
ORDER BY books.title
"""
)
rows = cur.fetchall()
print("Active Loans")
print("=" * 44)
if not rows:
print(" (none)")
else:
for title, borrower, loan_date in rows:
print(f" {title}")
print(f" Borrower : {borrower}")
print(f" Since : {loan_date}")
print("=" * 44)
# ── Entry point ───────────────────────────────────────────────────────────────
def main() -> None:
conn = sqlite3.connect(DB_PATH)
conn.execute("PRAGMA foreign_keys = ON")
create_tables(conn)
seed_data(conn)
print_active_loans(conn)
conn.close()
if __name__ == "__main__":
main()
▴
|
| 202 |
+437.0s [+0.0s] |
tool_result |
PASS |
| 203 |
+437.0s [+0.0s] |
tool_result |
PASS |
| 204 |
+442.0s [+5.0s] |
tool_call |
TodoWrite - todos: [8 items]
- [0] {content, status, activeForm}
- content: "Create schema.dbml (data model)"
- status: "completed"
- activeForm: "Creating schema.dbml"
- [1] {content, status, activeForm}
- content: "Create generator/parser.py (DBML parser)"
- status: "completed"
- activeForm: "Creating generator/parser.py"
- [2] {content, status, activeForm}
- content: "Create generator/helpers.py (data reshaper)"
- status: "completed"
- activeForm: "Creating generator/helpers.py"
- [3] {content, status, activeForm}
- content: "Create templates/schema.py.jinja2 (Jinja2 template)"
- status: "completed"
- activeForm: "Creating templates/schema.py.jinja2"
- [4] {content, status, activeForm}
- content: "Create generator/generate.py (driver script)"
- status: "completed"
- activeForm: "Creating generator/generate.py"
- [5] {content, status, activeForm}
- content: "Run generator to produce generated/schema.py"
- status: "completed"
- activeForm: "Running generator"
- [6] {content, status, activeForm}
- content: "Create library.py (consumer program)"
- status: "completed"
- activeForm: "Creating library.py"
- [7] {content, status, activeForm}
- content: "Run library.py to verify output"
- status: "in_progress"
- activeForm: "Running library.py"
|
| 205 |
+442.0s [+0.0s] |
tool_call |
TodoWrite - todos: [8 items]
- [0] {content, status, activeForm}
- content: "Create schema.dbml (data model)"
- status: "completed"
- activeForm: "Creating schema.dbml"
- [1] {content, status, activeForm}
- content: "Create generator/parser.py (DBML parser)"
- status: "completed"
- activeForm: "Creating generator/parser.py"
- [2] {content, status, activeForm}
- content: "Create generator/helpers.py (data reshaper)"
- status: "completed"
- activeForm: "Creating generator/helpers.py"
- [3] {content, status, activeForm}
- content: "Create templates/schema.py.jinja2 (Jinja2 template)"
- status: "completed"
- activeForm: "Creating templates/schema.py.jinja2"
- [4] {content, status, activeForm}
- content: "Create generator/generate.py (driver script)"
- status: "completed"
- activeForm: "Creating generator/generate.py"
- [5] {content, status, activeForm}
- content: "Run generator to produce generated/schema.py"
- status: "completed"
- activeForm: "Running generator"
- [6] {content, status, activeForm}
- content: "Create library.py (consumer program)"
- status: "completed"
- activeForm: "Creating library.py"
- [7] {content, status, activeForm}
- content: "Run library.py to verify output"
- status: "in_progress"
- activeForm: "Running library.py"
|
| 206 |
+442.0s [+0.0s] |
tool_result |
PASS |
| 207 |
+442.0s [+0.0s] |
tool_result |
PASS |
| 208 |
+444.0s [+2.0s] |
tool_call |
Bash - command: "python library.py"
- description: "Run library.py to verify the full pipeline end-to-end"
|
| 209 |
+444.0s [+0.0s] |
tool_call |
Bash - command: "python library.py"
- description: "Run library.py to verify the full pipeline end-to-end"
|
| 210 |
+444.0s [+0.0s] |
tool_result |
PASS |
| 211 |
+445.0s [+1.0s] |
tool_result |
PASS |
| 212 |
+447.0s [+2.0s] |
tool_call |
Bash - command: "python library.py && echo "---second run---" && python library.py"
- description: "Run library.py twice to verify idempotence"
|
| 213 |
+447.0s [+0.0s] |
tool_call |
Bash - command: "python library.py && echo "---second run---" && python library.py"
- description: "Run library.py twice to verify idempotence"
|
| 214 |
+447.0s [+0.0s] |
tool_result |
PASS |
| 215 |
+447.0s [+0.0s] |
tool_result |
PASS |
| 216 |
+450.0s [+3.0s] |
tool_call |
Bash - command: "sha256sum generated/schema.py && python generator/generate.py && sha256sum generated/schema.py"
- description: "Verify generator is deterministic (same hash both runs)"
|
| 217 |
+450.0s [+0.0s] |
tool_call |
Bash - command: "sha256sum generated/schema.py && python generator/generate.py && sha256sum generated/schema.py"
- description: "Verify generator is deterministic (same hash both runs)"
|
| 218 |
+450.0s [+0.0s] |
tool_result |
PASS |
| 219 |
+450.0s [+0.0s] |
tool_result |
PASS |
| 220 |
+454.0s [+4.0s] |
tool_call |
TodoWrite - todos: [8 items]
- [0] {content, status, activeForm}
- content: "Create schema.dbml (data model)"
- status: "completed"
- activeForm: "Creating schema.dbml"
- [1] {content, status, activeForm}
- content: "Create generator/parser.py (DBML parser)"
- status: "completed"
- activeForm: "Creating generator/parser.py"
- [2] {content, status, activeForm}
- content: "Create generator/helpers.py (data reshaper)"
- status: "completed"
- activeForm: "Creating generator/helpers.py"
- [3] {content, status, activeForm}
- content: "Create templates/schema.py.jinja2 (Jinja2 template)"
- status: "completed"
- activeForm: "Creating templates/schema.py.jinja2"
- [4] {content, status, activeForm}
- content: "Create generator/generate.py (driver script)"
- status: "completed"
- activeForm: "Creating generator/generate.py"
- [5] {content, status, activeForm}
- content: "Run generator to produce generated/schema.py"
- status: "completed"
- activeForm: "Running generator"
- [6] {content, status, activeForm}
- content: "Create library.py (consumer program)"
- status: "completed"
- activeForm: "Creating library.py"
- [7] {content, status, activeForm}
- content: "Run library.py to verify output"
- status: "completed"
- activeForm: "Running library.py"
|
| 221 |
+454.0s [+0.0s] |
tool_call |
TodoWrite - todos: [8 items]
- [0] {content, status, activeForm}
- content: "Create schema.dbml (data model)"
- status: "completed"
- activeForm: "Creating schema.dbml"
- [1] {content, status, activeForm}
- content: "Create generator/parser.py (DBML parser)"
- status: "completed"
- activeForm: "Creating generator/parser.py"
- [2] {content, status, activeForm}
- content: "Create generator/helpers.py (data reshaper)"
- status: "completed"
- activeForm: "Creating generator/helpers.py"
- [3] {content, status, activeForm}
- content: "Create templates/schema.py.jinja2 (Jinja2 template)"
- status: "completed"
- activeForm: "Creating templates/schema.py.jinja2"
- [4] {content, status, activeForm}
- content: "Create generator/generate.py (driver script)"
- status: "completed"
- activeForm: "Creating generator/generate.py"
- [5] {content, status, activeForm}
- content: "Run generator to produce generated/schema.py"
- status: "completed"
- activeForm: "Running generator"
- [6] {content, status, activeForm}
- content: "Create library.py (consumer program)"
- status: "completed"
- activeForm: "Creating library.py"
- [7] {content, status, activeForm}
- content: "Run library.py to verify output"
- status: "completed"
- activeForm: "Running library.py"
|
| 222 |
+454.0s [+0.0s] |
tool_result |
PASS |
| 223 |
+454.0s [+0.0s] |
tool_result |
PASS |
| | require | PASS no error |
| | expect | PASS files exist: *.dbml — found 1: ['schema.dbml'] |
| | expect | PASS files exist: *.jinja2 | *.j2 | *.jinja — found 1: ['templates/schema.py.jinja2'] |
| | achieve | ACHIEVED generator script present [challenging] — generator files: ['generated/schema.py', 'audit/agent-report.sh', 'generator/__init__.py', 'generator/parser.py', 'generator/generate.py', 'generator/helpers.py', 'generated/__pycache__/schema.cpython-312.pyc', 'generator/__pycache__/helpers.cpython-312.pyc', 'generator/__pycache__/parser.cpython-312.pyc', 'generator/__pycache__/__init__.cpython-312.pyc'] |
| | achieve | ACHIEVED library output present [expected] |
| | achieve | ACHIEVED file contains /jinja2|from jinja/ in *.py [challenging] |