caspar-learn

name	caspar-learn
description	Use when the user invokes /learn or asks to remember, save, or capture a pattern, decision, gotcha, procedure, or feature dossier from this session for later re-use ("please remember", "what did we learn?"). Captures durable project knowledge as an on-demand Skill. Do NOT trigger for simple personal preferences (those go to CLAUDE.md) or for recalling existing knowledge (that is /caspar:recall).
user-invocable	true

Learning Agent

Capture durable project knowledge as a project-level Skill, registered for on-demand recall. When invoked (/learn, /caspar:learn, Skill(caspar-learn)) this is the exclusive knowledge handler: do NOT write to MEMORY.md or any auto-memory system. Goal: someone with zero context becomes productive on the topic without follow-up questions.

Inputs

• Topic/content from $ARGUMENTS; if absent, infer from the last ~10–20 messages.
• {{project_root}} = CLAUDE_PROJECT_DIR else $PWD. YOU MUST NOT traverse up to a git root / main worktree — save where the user is working. Never use git rev-parse.
• Registry (read first): {{project_root}}/.claude/skills/caspar-recall/references/registry.toon — lines {skill-name}|{category}|{triggers}|{description}.

Working Set

• Skill files: {{project_root}}/.claude/skills/{category}-{slug}/SKILL.md.
• Recall skill + registry: {{project_root}}/.claude/skills/caspar-recall/.

Method / guardrails

1. Context or investigate. If the topic was discussed in detail or you already understand it this session, proceed. Otherwise enter Investigation Mode — do NOT fabricate. Dispatch @caspar:finder to map relevant files, then 2–3 read-only @caspar:analyst passes answering the category's required-section questions (cite file:line). Synthesize: cross-reference shared files, resolve conflicts by reading the disputed code, flag gaps.
2. Capture criteria — proceed only if ≥2 of 4 hold: Frequency (recurs) · Pain (cost real debug time) · Surprise (non-obvious) · Durability (true in 6 months). Skip one-offs, generic knowledge, temp workarounds, and simple preferences (→ CLAUDE.md).
3. Categorize — use ONLY these (never invent): feature · gotchas · patterns · decisions · procedures · integration · performance · testing · ux · strategy.
4. Required sections by category (minimums — add depth per Content Principles below):
   • feature: What is it? · Why/use cases (≥3) · User flows (≥2) · Technical design · Key files (≥3) · Common tasks (≥2)
   • gotchas: Symptom · Root cause · Solution (code) · Prevention
   • patterns: Problem · Solution (code) · When to use · Trade-offs
   • decisions: Context · Options considered · Decision · Rationale · Consequences
   • procedures: When to use · Prerequisites · Steps (numbered, w/ commands) · Verification
   • integration: What it is · How we connect (auth/endpoints/SDK) · Key operations (code) · Gotchas
   • performance/testing/ux/strategy: Context · the actionable knowledge · examples · pitfalls
5. Content principles (all categories): lead with the one key insight · orient (why, 2–3 sentences) before details · be actionable (commands/code/steps) · show with examples · call out pitfalls · keep scannable (80% value in a 60s skim).
6. Name = {category}-{slug}, lowercase-kebab-case only (letters/numbers/hyphens), no colons/slashes/underscores/parens, slug ≤5 descriptive words. E.g. feature-auth-flows, gotchas-hook-timeout.
7. Match → UPDATE > APPEND > CREATE (prefer consolidation). Scan registry for same-category / overlapping-trigger / related candidates; read the candidate SKILL.md before deciding. UPDATE when new info contradicts/extends/supersedes; APPEND when distinct but same skill; CREATE when no semantic match.
8. Verify before proposing (esp. Investigation Mode): spot-check 2–3 key claims against real files; confirm each Key-File purpose; trace one flow for feature learnings. Set confidence low/medium/high accordingly; flag unverified areas inline. Default Investigation learnings to medium.

Outputs + DONE

• A SKILL.md written to {{project_root}}/.claude/skills/{category}-{slug}/SKILL.md with frontmatter (name, description starting "Use when…", user-invocable: true) and the dated header (Trigger · Confidence · Created · Updated · Version). On UPDATE: preserve Created, set Updated=today, increment Version. On APPEND: add a new ----delimited section with its own header.
• Registered via the plugin's register CLI (updates registry.toon, regenerates caspar-recall/SKILL.md, injects TRIGGER when: into all skill descriptions). The registry description MUST start with "Use when…" and describe when to use the knowledge, not what it contains.
• DONE when: user approved at the gate · file written at the correct project-level path · registry entry + recall skill regenerated. Confirm with the saved path and registry path.

Handoff

Report the saved skill path, category, confidence, and registry path. Proactive update: if you loaded a skill earlier this session and found it incomplete/wrong/extendable, edit it directly (no proposal gate — just inform the user), re-register, and regenerate recall.

Escalate-If

• Category is ambiguous → ask the user which of the ten categories.
• Investigation can't confirm a load-bearing claim → flag it inline and set confidence low; do not assert unverified behavior as fact.