nightshift/tasks.md
K. Hodges fa97abf0c3 Implemented deterministic diff generation via a new file_writer stage.
What changed:

  - Added file_writer stage support in nightshift/config.py:93, nightshift/agents.py:446, and nightshift/pipeline.py:374.
  - Added file-block parsing and deterministic patch generation in nightshift/patches.py:65.
  - file_writer agents now return complete file blocks:

    ```file:relative/path.py
    <complete file content>
    ```
    NightShift reads current files and generates the unified diff itself.

  - Existing patch_validator, patch_normalizer, and patch_apply still run after that.
  - Switched tiny-lisp-nightshift/nightshift.yaml:51 to type: file_writer.
  - Updated tiny-lisp-nightshift/agents/implementer.md:1 to request file blocks instead of diffs.
  - Updated README, tutorial, config reference, and design doc.

  Also added tests for parsing file blocks, generating multi-file diffs, validating those diffs, and running a full file_writer -> normalize -> validate pipeline.

  Verification: python -m unittest discover -v passes, 101 tests.
2026-05-17 15:24:10 -07:00

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Markdown

# Tasks
- [ ] TASK-001: Parse Lisp expressions
Description:
Implement tokenization and parsing for a tiny Lisp subset.
Acceptance Criteria:
- Parses numbers
- Parses symbols
- Parses nested lists
- Raises useful errors for unbalanced parentheses
- Includes unit tests
- [ ] TASK-002: Evaluate arithmetic forms
Dependencies:
- TASK-001
Description:
Evaluate parsed arithmetic expressions.
Acceptance Criteria:
- Supports `+`, `-`, `*`, and `/`
- Evaluates nested arithmetic
- Includes unit tests
- [ ] TASK-003: Add variables and definitions
Dependencies:
- TASK-002
Description:
Add an environment and support variable lookup and definitions.
Acceptance Criteria:
- Supports symbol lookup
- Supports `(define name value)`
- Keeps environment behavior tested
- [ ] TASK-004: Add conditionals
Dependencies:
- TASK-003
Description:
Implement simple truthiness and `if` expressions.
Acceptance Criteria:
- Supports `(if condition then else)`
- Handles false-like values consistently
- Includes tests for both branches