---
phase: 35-ai-discussion-recorder
verified: 2026-05-06T23:44:00Z
status: passed
score: 8/8 must-haves verified
re_verification: false
---

# Phase 35: AI Discussion Recorder -- Verification Report

**Phase Goal:** Create `paperforge/worker/discussion.py` -- a stdlib-only Python module that records AI-paper discussion sessions into `ai/discussion.json` (canonical, append-only) and `ai/discussion.md` (human-readable) with atomic writes. Wire it into the `/pf-paper` agent prompt so agent sessions automatically save discussion records at completion.

**Verified:** 2026-05-06T23:44:00Z
**Status:** PASSED
**Re-verification:** No (initial verification)

---

## Goal Achievement

### Observable Truths

| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 1 | Importing and calling `record_session()` creates `ai/discussion.json` containing `schema_version: "1"`, `paper_key`, and `sessions[]` array | VERIFIED | Test `test_create_both_files` passes; JSON envelope verified in integration test |
| 2 | Calling `record_session()` creates `ai/discussion.md` with human-readable `**问题:**`/`**解答:**` format and chronological `##` session headings | VERIFIED | Test `test_create_both_files` passes; MD content verified in integration test |
| 3 | Re-running `record_session()` for the same paper appends a new session to both files -- never overwrites previous discussions | VERIFIED | Test `test_append_second_session` passes; sessions.length=2, first session data preserved |
| 4 | Both files are written atomically via tempfile + os.replace() -- partial writes don't corrupt | VERIFIED | Test `test_atomic_write_no_partial` passes; source code uses `tempfile.mkstemp()` + `os.replace()` (2 calls, one per file) |
| 5 | Discussion files use explicit `utf-8` encoding and `ensure_ascii=False` -- Chinese content survives without mojibake | VERIFIED | Test `test_cjk_encoding` passes; `grep ensure_ascii=False` returns 4 matches in source |
| 6 | Module uses Python stdlib only (json, pathlib, datetime, tempfile, os, uuid, argparse, re, sys, logging) -- zero new dependencies | VERIFIED | AST import analysis confirms: only stdlib + `from paperforge.{config,worker._utils}` |
| 7 | CLI subcommand works: `python -m paperforge.worker.discussion record <key> --vault <path> --agent pf-paper --model <model>` | VERIFIED | Test `test_cli_invocation` passes; manual CLI integration test returns exit code 0 and creates both files |
| 8 | `/pf-paper` prompt instructs agent to accumulate Q&A pairs during session and call CLI at session end | VERIFIED | pf-paper.md has "保存讨论记录" section with CLI invocation instructions and pf-deep exclusion per D-05 |

**Score:** 8/8 truths verified

---

### Required Artifacts

| Artifact | Expected | Status | Details |
|----------|----------|--------|---------|
| `paperforge/worker/discussion.py` | `record_session()` function and CLI subcommand (>=150 lines) | VERIFIED | 401 lines. Exports `record_session()` with full implementation: paper metadata lookup via rglob, atomic append-only writes, CLI parser with `record` subcommand. |
| `tests/test_discussion.py` | Unit tests for `record_session()` behavior (>=80 lines) | VERIFIED | 261 lines. Class-based test suite with 7 tests covering creation, append, error, encoding, atomicity, CLI. |
| `paperforge/skills/literature-qa/scripts/pf-paper.md` | Updated prompt with `保存讨论记录` step | VERIFIED | 137 lines. Step 8 (lines 98-133) with Q&A accumulation, CLI invocation, pf-deep exclusion, error handling. |

---

### Key Link Verification

| From | To | Via | Status | Details |
|------|----|-----|--------|---------|
| `discussion.py` | `paperforge.config` | `from paperforge.config import paperforge_paths` | WIRED | Line 27. Used in `_find_paper_metadata()` and `_build_ai_dir()` for path resolution. |
| `discussion.py` | `paperforge.worker._utils` | `from paperforge.worker._utils import slugify_filename` | WIRED | Line 28. Used in `_build_ai_dir()` for title slugging in directory path. |
| `pf-paper.md` | `discussion.py` | CLI invocation at session end | WIRED | Line 117: `python -m paperforge.worker.discussion record <ZOTERO_KEY> --vault "<VAULT_PATH>" --agent pf-paper --model "<MODEL_NAME>" --qa-pairs '<JSON_ARRAY>'` |

---

### Data-Flow Trace (Level 4)

| Artifact | Data Variable | Source | Produces Real Data | Status |
|----------|-------------|--------|-------------------|--------|
| `discussion.py` | `meta` (paper metadata) | `_find_paper_metadata()` via `paperforge_paths()` + `rglob` in library-records | YES -- scans real vault library-records files for zotero_key frontmatter | FLOWING |
| `discussion.py` | `ai_dir` | `_build_ai_dir()` via `paperforge_paths()` + `slugify_filename()` | YES -- resolves to `Literature/{domain}/{key} - {slug}/ai/` on disk | FLOWING |
| `discussion.py` | `existing_sessions` | `json.loads()` from existing discussion.json on disk | YES -- reads and appends to existing sessions; starts fresh if missing/corrupted | FLOWING |

---

### Behavioral Spot-Checks

| Behavior | Command | Result | Status |
|----------|---------|--------|--------|
| Module importable | `from paperforge.worker.discussion import record_session` | Import success | PASS |
| CLI help displays | `python -m paperforge.worker.discussion --help` | Usage printed | PASS |
| 7 unit tests pass | `pytest tests/test_discussion.py -v --tb=short` | 7/7 passed in 0.95s | PASS |
| CLI produces both files | Integration test: create vault, run CLI, check outputs | Exit code 0, both files created, schema_version "1", session_id len 36 | PASS |
| CJK encoding round-trip | Test `test_cjk_encoding` | Chinese content survives read-back | PASS |
| Append preserves data | Test `test_append_second_session` | Second call adds session, first session intact | PASS |

---

### Requirements Coverage

| Requirement | Source Plan | Description | Status | Evidence |
|------------|-----------|-------------|--------|----------|
| AI-01 | 35-01-PLAN.md | `discussion.py` writes discussion.md (human-readable Q&A, `问题:`/`解答:` format, chronological sections) into `ai/` | SATISFIED | `_build_md_session()` produces `**问题:**`/`**解答:**` format; test verifies output |
| AI-02 | 35-01-PLAN.md | `discussion.py` writes discussion.json (structured, `sessions[]` array with `schema_version`, `timestamp`, `qa_pairs[]`) into `ai/` | SATISFIED | JSON envelope with `schema_version: "1"`, `paper_key`, `sessions[]`; test verifies structure |
| AI-03 | 35-01-PLAN.md | `/pf-paper` and `/pf-deep` agent sessions trigger discussion recorder at session completion | SATISFIED (with note) | pf-paper.md updated with recording step; pf-deep **intentionally excluded** per D-05 (plan explicitly overrides AI-03 wording on this point -- deep-read content lives in formal notes) |

**Orphaned requirements check:** All 3 requirement IDs (AI-01, AI-02, AI-03) from PLAN frontmatter are mapped in REQUIREMENTS.md traceability table to Phase 35. Zero orphaned requirements.

---

### Anti-Patterns Found

| File | Line | Pattern | Severity | Impact |
|------|------|---------|----------|--------|
| None | -- | -- | -- | Zero anti-patterns detected in scan (TODO/FIXME/placeholder/empty-impl/null-return) |

---

### Deviations from Roadmap

1. **pf-deep exclusion**: ROADMAP.md Phase 35 Success Criterion 1 states "Running `/pf-paper` or `/pf-deep` for a paper creates `ai/discussion.json`". The PLAN explicitly overrides this per D-05: "Only `/pf-paper` records discussions. `/pf-deep` does NOT record (output already in formal note). This OVERRIDES the AI-03 requirement wording which mentions both." This is a documented design decision vetted during phase design -- not a gap.

2. **mkstemp instead of NamedTemporaryFile**: PLAN specifies `tempfile.NamedTemporaryFile`, implementation uses `tempfile.mkstemp()` (fd-based). SUMMARY documents this as a deliberate deviation to avoid Windows file-locking issues. Functionally equivalent -- both achieve atomic write via temp file + `os.replace()`.

Both deviations are documented and justified. No corrective action needed.

---

### Gaps Summary

**No gaps found.** All 8 must-haves verified successfully. All 7 tests pass. Module is importable, CLI works end-to-end, pf-paper.md prompt includes recording step with pf-deep exclusion.

---

## Verification Details

### Module Structure

```
paperforge/worker/discussion.py (401 lines)
  record_session()         -- Public API: creates/updates both JSON and MD files
  _find_paper_metadata()   -- Scans library-records via rglob + frontmatter regex
  _build_ai_dir()          -- Constructs Literature/{domain}/{key} - {slug}/ai/ path
  _build_session()         -- Creates session dict with UUID, timestamp, qa_pairs
  _atomic_write_json()     -- tempfile.mkstemp + os.replace for JSON
  _atomic_write_md()       -- tempfile.mkstemp + os.replace for MD
  _build_md_header()       -- "# AI Discussion Record: {title}"
  _build_md_session()       -- "## {date} -- {agent} ({model})" + 问题:/解答: pairs
  _md_content()            -- Append logic: new file or append to existing
  main() / _build_cli_parser() -- CLI entry point with argparse

tests/test_discussion.py (261 lines)
  TestRecordSession
    test_create_both_files       -- JSON schema + MD format
    test_append_second_session   -- Append-only semantics
    test_missing_vault            -- Error: non-existent vault
    test_unknown_key             -- Error: unknown zotero_key
    test_cjk_encoding            -- CJK round-trip via ensure_ascii=False
    test_atomic_write_no_partial -- Atomic write integrity
    test_cli_invocation          -- CLI subprocess invocation
```

### Import Dependency Tree

```
paperforge.worker.discussion
  +-- __future__ (stdlib)
  +-- argparse (stdlib)
  +-- json (stdlib)
  +-- logging (stdlib)
  +-- os (stdlib)
  +-- re (stdlib)
  +-- sys (stdlib)
  +-- tempfile (stdlib)
  +-- uuid (stdlib)
  +-- datetime (stdlib)
  +-- pathlib (stdlib)
  +-- paperforge.config (project)
  |     +-- paperforge_paths()
  +-- paperforge.worker._utils (project)
        +-- slugify_filename()
```

### pf-paper.md Recording Step (lines 98-133)

The prompt now includes:
- Step 8 "保存讨论记录" with Q&A accumulation instructions
- CLI invocation template with `paperforge.worker.discussion record`
- JSON output format documentation
- Explicit pf-deep exclusion note per D-05
- Error handling: non-fatal if CLI returns error
- UTF-8 encoding note

---

_Verified: 2026-05-06T23:44:00Z_
_Verifier: Terminal VT-OS/OPENCODE (gsd-verifier)_
