Postmortem skill — ralphy pipeline

Why multi-doc

A single POSTMORTEM.md mixes very different audiences:

• Future-me on the next similar project wants lessons + model picks + prompt patterns (02-lessons.md, 04-models-and-cost.md).
• The user reviewing what we actually did wants a chronological replay of their asks and the agent's steps (01-chat-history.md).
• A CLI maintainer wants a clean list of ralphy verbs that failed or didn't exist, plus the raw workaround used (03-cli-issues.md). This is the highest-leverage doc — it's what turns the session into a CLI roadmap.
• The playbook author wants meta-level where did the workflow break, what doc was wrong / missing (05-workflow-fixes.md).
• The extract / publish step (templater, the publish-entity.ts path #056) wants a clean record of which finished Units the project shipped and the provenance blocks behind each (06-units.md). It freezes the entity facts while fresh so they can be classified + published later without re-deriving them.

When you stuff all of these into one file, the CLI-issues list and the units record get buried in a 500-line rules document and never make it into a PR. The split is so each doc can be skimmed by the right reader.

When to fire

Hard triggers (always do it):

• User types /postmortem
• "write a postmortem", "retro this", "what did we learn", "write up the lessons", "debrief"

Proactive triggers (offer to do it, don't auto-execute):

• Session has had ≥2 user corrections ("don't like it", "2/10", "redo it") AND a project ID was active
• ≥1 instance of the agent reaching past ralphy (raw bunx tsx against a TS file, raw ffmpeg, raw curl against a provider) — that's a CLI gap and the session must document it before it's lost
• User says "well that's about it" / "project is done" after a long iteration session
• After a ralphy render succeeds at the end of a multi-iteration session

What I produce

A directory at .ralphy/workspaces/<ws>/projects/<id>/postmortem/ with 7 files:

.ralphy/workspaces/<ws>/projects/<id>/postmortem/
├── 00-INDEX.md            map + 3-bullet TL;DR linking to the 6 substantive docs
├── 01-chat-history.md     chronological: user prompt → agent steps → outcome
├── 02-lessons.md          rules learned the hard way (TL;DR, pipeline-from-scratch, pitfalls, prompt patterns)
├── 03-cli-issues.md       ralphy verbs that failed or didn't exist + raw workaround used + suggested fix
├── 04-models-and-cost.md  $ rollup by phase + which model won which task + discovered model breakage
├── 05-workflow-fixes.md   meta: where the playbook misled us, what to add to AGENTS.md / docs/playbooks/
└── 06-units.md            units produced + provenance: each shipped Unit + its block slugs (NEW vs REUSED) + any captured Blueprint path

Each file has its own template under references/. Read the template for the doc you're about to write — don't paraphrase the structure from memory.

Source material to read (in order)

Don't write from memory — pull from the actual session artifacts. Different docs need different sources:

1. Conversation context (drives 01-chat-history.md, 02-lessons.md, 05-workflow-fixes.md) — scroll back through the recent message history in this chat. Capture:

   • Every user turn that drove a phase change (scenario lock, asset gen, render, regen, postmortem). One row per user turn in 01.
   • User-feedback moments ("don't like it", "bad", "2/10", "redo it", "too static", "doesn't match") and what the agent did in response.
   • Model swaps you made (started with X → switched to Y after Z failed).
   • Every time the agent reached past ralphy — raw bunx tsx, raw ffmpeg, raw curl, raw yt-dlp, hand-written TS in .ralphy/workspaces/<ws>/projects/<id>/scripts/. Each instance is a row in 03-cli-issues.md.
   • Failed CLI runs (exit code 1, content moderation refusals, "no job.id", "File is not in a valid base64 format"). Each is a row in 03.
   • Successful pivots (split scene into micro-shots, stripped C2PA, switched vendor).
   • Cost spikes (multiple retries on same slot).
   • Append-only violations — any moment the agent deleted, overwrote, or rewrote an artifact under .ralphy/workspaces/<ws>/projects/<id>/ instead of versioning. Each is a row in 05.

2. .ralphy/workspaces/<ws>/projects/<id>/logs/generations.jsonl (drives 04-models-and-cost.md) — the structured truth of every model call. Run: jq -c 'select(.kind != null) | {kind, slot, ep: .endpoint, status, cost: (.cost_usd // .costUsd // 0), err: .error}' .ralphy/workspaces/<ws>/projects/<id>/logs/generations.jsonl

   • Sum cost by kind (image / video / music / voiceover / captions) → total $ per phase
   • Count status == "error" entries → sunk-cost retries
   • Group by endpoint → which model won which task (success count + total $)

3. .ralphy/workspaces/<ws>/projects/<id>/logs/user-prompts.jsonl (drives 01-chat-history.md) — chronological user prompts as the CLI saw them. Cross-reference with the in-chat turns.

4. .ralphy/workspaces/<ws>/projects/<id>/STORYBOARD.md if it exists — the locked plan vs what shipped (drives 02-lessons.md).

5. src/videos/<id>/scenes.ts — final composition (scene count, durations, startFrom values, MUSIC_FILE pick) (drives 02-lessons.md "Composition tricks").

6. .ralphy/workspaces/<ws>/projects/<id>/asset-manifest.json or artifacts/ dir listing — what actually ended up in the render. Pay attention to .v2., .v3. files — they are evidence of regen iterations and feed the cost-vs-minimum estimate.

7. .ralphy/workspaces/<ws>/projects/<id>/units/*/unit.json (drives 06-units.md) — the finished, curated Units the project shipped (formed by ralphy unit create, issue #069). Each carries slug, format, ordered media, and a provenance block (template / style / recipes[] / assets[] slugs). 06-units.md records each Unit and marks every provenance block NEW vs. REUSED. If there is no units/ dir, 06 uses its empty case — do NOT fabricate units from artifacts/. Run: for u in .ralphy/workspaces/<ws>/projects/<id>/units/*/unit.json; do jq -c '{slug, format, provenance}' "$u"; done

8. git log --oneline -20 — commits made during the session reveal phase boundaries.

Path logic

1. Detect active ralphy project:
   - Last `--project <id>` flag in recent bash calls, OR
   - cwd is .ralphy/workspaces/<ws>/projects/<id>/, OR
   - User explicitly named a project in the conversation

2. Target directory:
   - .ralphy/workspaces/<ws>/projects/<id>/postmortem/

3. If the dir exists already (previous session ran the skill):
   - For each of the 7 files, APPEND an "Iteration N addendum" section (numbered).
   - Never delete or rewrite existing addendum sections (append-only invariant).
   - Update 00-INDEX.md to reflect the new iteration count in its TL;DR.
   - If a prior session pre-dates 06-units.md (6-file set), CREATE 06-units.md fresh from its template this run — that is a new file, not an overwrite.

4. If the dir doesn't exist:
   - Create it.
   - Write all 7 files from their templates.
   - Date the bottom of each with today's date.

5. Legacy `POSTMORTEM.md` (single-file) at the project root:
   - Leave it untouched. It's the v1 record; the new postmortem/ dir is the v2 record.
   - In 00-INDEX.md, link to it under "Legacy single-file postmortem" so future-me knows where to find the old write-up.

6. If no ralphy project detectable:
   - Ask the user where to save (offer postmortem/ at repo root as a fallback for non-project work), OR
   - Print all 6 docs to chat as markdown blocks and let them save manually.

Quality bar (per doc)

The set is good if a reader hitting it cold can, in 10 minutes:

• 01 — replay the session turn by turn without watching the chat log.
• 02 — name the 3-5 rules that would have saved the most time.
• 03 — file a GitHub issue for each CLI gap, copy-pasting the row verbatim.
• 04 — pick default models for the next similar project, knowing what $ each implies.
• 05 — open a PR against docs/playbooks/ or AGENTS.md fixing the doc that misled us.

The set is bad if any single doc reads like a generic listicle. Every row in every doc must trace to a specific moment in this session.

Tone

Match the user's working register: this user works in Russian + English bilingually, uses terse direct feedback, doesn't want fluff. Write the docs in English (technical record), but Russian section titles or quoted user feedback are fine when they appear verbatim in the chat.

Per-file length calibration (sweet spot):

• 00-INDEX.md: 30-60 lines
• 01-chat-history.md: depends on session size — ~1 row per user turn, no upper cap
• 02-lessons.md: 200-400 lines
• 03-cli-issues.md: 100-250 lines (every row is actionable)
• 04-models-and-cost.md: 80-150 lines
• 05-workflow-fixes.md: 100-200 lines
• 06-units.md: 40-150 lines (scales with unit count; the empty case is ~15 lines)

Append-only invariant (applies to this skill too)

The postmortem skill MUST follow the same append-only rule as the rest of ralphy:

• Never overwrite an existing postmortem file. Always append a new ## Iteration N addendum section at the end of each file.
• Never delete an old POSTMORTEM.md single-file in projects that pre-date the multi-doc layout. Link to it from 00-INDEX.md instead.
• Never re-flow / reorganize an earlier iteration's content — fixing a stale claim is one thing, but the historical record stays.
• Even if the user says "rewrite the postmortem" — interpret that as "add a fresh addendum at the top of 00-INDEX.md and the relevant docs" unless they explicitly say "delete the old one and write it from scratch".

Example calls to mental-prototype before writing

Before opening Write tool, mentally walk through each doc:

• 01-chat-history.md — "Can I list the user's turns in order? Did I miss a regen request?"
• 02-lessons.md — "What 3 moments in this session cost the user the most time / money?"
• 03-cli-issues.md — "How many times did I type bunx tsx, ffmpeg, or curl against a provider? Each one is a row."
• 04-models-and-cost.md — "Did I run jq over generations.jsonl, or am I guessing at $?"
• 05-workflow-fixes.md — "What playbook section, if it had said X, would have prevented the worst iteration?"
• 06-units.md — "Which units/<slug>/unit.json did this project form, and for each provenance block, is it NEW (publish candidate) or REUSED (already in the library)? Was a per-unit Blueprint captured (units/<slug>/blueprint/, #076)? If there is no units/ dir, the empty case applies."

If you can't answer all six with specifics from this session, you don't have enough material yet — read more of the conversation / gen-log before writing.

What NOT to do

• Don't invent costs you didn't see in the gen-log. If you can't compute $ exactly, write "~$X" and note the basis.
• Don't write rules you can't tie to a specific moment ("always use refs" — too generic; "always pull canonical product PNGs in step 1 because I generated wrong-color shots before user dropped reference screenshots" — useful).
• Don't quote AGENTS.md / playbooks back at the user — they wrote those. Postmortem captures the layer between the playbook and the project — what the playbook didn't yet cover.
• Don't run bunx tsc / heavy tooling. This is a synthesis task, not a code-fix task.
• Don't rm or mv anything in .ralphy/workspaces/<ws>/projects/<id>/ — see append-only invariant above and the project-wide invariant in AGENTS.md.
• Don't squash 03-cli-issues.md down to "summary" — every gap row is the seed of a GitHub issue. Keep them granular even if the doc gets long.

Final step

After writing all 7 files, give the user this summary in chat:

1. Where it's saved: .ralphy/workspaces/<ws>/projects/<id>/postmortem/ (list the 7 filenames).
2. N rules captured: brief one-line list of the headline rules from 02-lessons.md.
3. $ accounted: total spend + avoidable-vs-genuine breakdown (from 04).
4. CLI gaps to file: count + one-line list of suggested new ralphy verbs (from 03).
5. Playbook fixes proposed: count + one-line list of which playbook docs need editing (from 05).
6. Units shipped: count of Units recorded + the NEW-block publish candidates from 06 (one line — record only; publishing is templater + the publish-entity.ts path #056).
7. Next-time win: the single biggest "if I knew this at the start I'd have saved $X" insight.

Ask if they want any section expanded or any rule re-phrased. Don't auto-iterate — let them drive.

Distill into memory proposals (#113)

After the summary, close the learning loop — turn the postmortem into staged memory candidates:

ralphy memory distill <project-id> --dry-run   # preview candidates first
ralphy memory distill <project-id>             # stage into proposed/

Then surface the proposals to the user (slug + description + tier per line) and let THEM decide: ralphy memory approve <slug> / ralphy memory reject <slug> / ralphy memory approve --all. Hard rules:

• Never auto-approve. Distillation stages into proposed/; promotion to active memory is the user's explicit call (user-approved ingestion, idea 013 decision).
• Candidates the verb routes to routed_to_guideline are NOT memory material — they carry an extractable artifact. Offer to file them toward guidelines/ / a skill instead.
• A candidate whose **Does NOT apply to:** line is missing or vague should be tightened before approval — over-application is the known failure mode (#045).
• For sessions too light for a full postmortem, the cheap path is the memory-review skill (agent reads its own conversation, 0-5 entries, no LLM call) — this distill step is the deep path on top of a written postmortem set.