learn

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• SKILL.md

SKILL.md (first lines)

# /learn - Deep Dive Learning Pattern

Explore a codebase with 3 parallel Haiku agents → create organized documentation.

## Usage

```
/learn [url]             # Auto: clone via ghq, symlink origin/, then explore
/learn [slug]            # Use slug from ψ/memory/slugs.yaml
/learn [repo-path]       # Path to repo
/learn [repo-name]       # Finds in ψ/learn/owner/repo
/learn --init            # Restore all origins after git clone (like submodule init)
```

## Depth Modes

| Flag | Agents | Files | Use Case |
|------|--------|-------|----------|
| `--fast` | 1 | 1 overview | Quick scan, "what is this?" |
| (default) | 3 | 3 docs | Normal exploration |
| `--deep` | 5 | 5 docs | Master complex codebases |

```
/learn --fast [target]   # Quick overview (1 agent, ~2 min)
/learn [target]          # Standard (3 agents, ~5 min)
/learn --deep [target]   # Deep dive (5 agents, ~10 min)
```

## Directory Structure

```
ψ/learn/
├── .origins             # Manifest of learned repos (committed)
└── owner/
    └── repo/
        ├── origin       # Symlink to ghq source (gitignored)
        ├── repo.md      # Hub file - links to all sessions (committed)
        └── YYYY-MM-DD/  # Date folder
            ├── 1349_ARCHITECTURE.md      # Time-prefixed files
            ├── 1349_CODE-SNIPPETS.md
            ├── 1349_QUICK-REFERENCE.md
            ├── 1520_ARCHITECTURE.md      # Second run same day
            └── ...
```

**Multiple learnings**: Each run gets time-prefixed files (HHMM_), nested in date folder.

**Offload source, keep docs:**
```bash
unlink ψ/learn/owner/repo/origin   # Remove symlink
ghq rm owner/repo                  # Remove source
# Docs remain in ψ/learn/owner/repo/
```

## /learn --init

Restore all origins after cloning (like `git submodule init`):

```bash
ROOT="$(pwd)"
# Read .origins manifest and restore symlinks
while read repo; do
  ghq get -u "https://github.com/$repo"
  OWNER=$(dirname "$repo")
  REPO=$(basename "$repo")
  mkdir -p "$ROOT/ψ/learn/$OWNER/$REPO"
  ln -sf "$(ghq root)/github.com/$repo" "$ROOT/ψ/learn/$OWNER/$REPO/origin"
  echo "✓ Restored: $repo"
done < "$ROOT/ψ/learn/.origins"
```

## Step 0: Detect Input Type + Resolve Path

**CRITICAL: Capture ABSOLUTE paths first (before spawning any agents):**
```bash
date "+🕐 %H:%M %Z (%A %d %B %Y)" && ROOT="$(pwd)"
echo "Learning from: $ROOT"
```

**IMPORTANT FOR SUBAGENTS:**
When spawning Haiku agents, you MUST give them TWO literal paths:
1. **SOURCE_DIR** (where to READ code) — the **`readlink`-RESOLVED ghq path**.
   **Never the `origin/` symlink path.** See ⚠️ below — this is not cosmetic.
2. **DOCS_DIR** (where to WRITE docs) - the parent directory, NOT inside origin/

⚠️ **BUG 1 (writes)**: If you only give agents `origin/` path, they cd into it and write there → files end up in WRONG repo!

⚠️ **BUG 2 (reads — worse, and silent)**: The `origin/` path is *nested inside
this oracle repo* (`ROOT/ψ/learn/...`). An agent handed that path reads the
target as a subdirectory of us and describes it as a variant of our repo. Measured
on `mattpocock/skills` (2026-08-16): the arm given the nested path produced 3
contaminated docs / 26 false claims; the arm given the resolved ghq path produced
**zero**. Same target, same minute, same model. Resolve it:

```bash
SOURCE_DIR="$(readlink "$ROOT/ψ/learn/$OWNER/$REPO/origin")"   # → ghq path
```

**FIX**: Always give BOTH paths as LITERAL absolute values (no variables!):

Example: ROOT=/home/user/ghq/.../my-oracle, learning acme-corp/cool-library, TODAY=2026-02-04, TIME=1349:
```
READ from:  /home/user/ghq/github.com/acme-corp/cool-library/     ← resolved, NOT under ψ/
WRITE to:   .../ψ/learn/acme-corp/cool-library/2026-02-04/1349_[FILENAME].md
```

Tell each agent: "Read from [SOURCE_DIR]. Write to [DOCS_DIR]/[TIME]_[FILENAME].md"

### ⚠️ MANDATORY: Isolation preamble (prepend to EVERY agent prompt)

Agents spawned here inherit **this oracle repo's** `CLAUDE.md` as project
instructions. They will silently describe the *target* repo using *our*
vocabulary. Measured on `mattpocock/skills` (2026-08-16): 3 of 5 docs
contaminated, 26 false structural claims — including a doc that wrote
*"(not in mattpocock/skills; reference from oracle-skills-cli CLAUDE.md)"*
and then asserted the claim anyway. **Detection is not containment.** The
agent noticing the mismatch does not stop it shipping.

Prepend this verbatim to every agent prompt:

From Soul-Brews-Studio/arra-oracle-skills-cli, MIT.

More from Soul-Brews-Studio/arra-oracle-skills-cli