Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/dropbox/witchcraft/pickbrainnpx skills add dropbox/witchcraft --skill pickbraingit clone --depth 1 https://github.com/dropbox/witchcraftWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00085 | $0.01083 |
| Opus 5 | $0.00043 | $0.00541 |
| Sonnet 5 | $0.00017 | $0.00217 |
| Haiku 4.5 | $0.00009 | $0.00108 |
Grade A, and why
pickbrain scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Pickbrain — Semantic Search for Claude History and Slack
Search past Pi sessions, Claude Code conversations, Codex sessions, Slack messages, memory files, and authored files using semantic search.
Installation
Build and install from the repo root:
make pickbrain
# then copy or symlink the binary to somewhere on your PATH:
ln -sf "$(pwd)/pickbrain" ~/bin/pickbrain
The binary embeds its own model weights (embed-assets feature), so no separate assets directory is needed.
Usage
Run pickbrain via Bash with the user's query:
pickbrain "$ARGUMENTS"
Pickbrain automatically ingests new Pi/Claude/Codex sessions, Slack conversations (from the desktop app's local IndexedDB), memories, and project config files before each search.
Interpreting Results
Each result includes:
- Timestamp and project directory (or channel name for Slack results)
- Source —
pi,claude,codex, orslack - Session ID and turn number (Claude/Codex) or channel + thread ID (Slack)
- Matching text — the relevant chunk from the conversation
Slack results show thr:TIMESTAMP for threaded conversations. This thread ID can be passed to --session or --dump to filter/view that thread.
Present results as a concise summary. Quote the most relevant excerpts. If the user wants to dig deeper into a specific session, use --dump:
pickbrain --dump <session-id> [--turns <start>-<end>]
pickbrain --dump <channel-name> [--turns <start>-<end>] [--since 7d]
pickbrain --dump thr:<thread-ts>
Slack results include (you: Name (@handle)) to identify the logged-in user.
Filtering
To search within the current (calling) session:
pickbrain --current "<query>"
To search within a specific session, channel, or thread:
pickbrain --session <session-id> "<query>"
pickbrain --channel <channel-name> "<query>"
pickbrain --session thr:<thread-ts> "<query>"
--channel is an alias for --session.
To exclude the current (calling) session from results:
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 140 lines · 85 tokens per session scan A f3c6f183a26a
pickbrain is a skill published in the GitHub repository dropbox/witchcraft (507 stars, last pushed 13d ago), licensed Apache-2.0. It adds 85 tokens to every session and 1,083 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
systematic-debugging
Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.
next-cache-components-adoption
Turn on Cache Components in a Next.js app and resolve the blocking routes it surfaces. Use when the user wants to enable, adopt, or migrate to Cache Components, flip the cacheComponents flag, work through a flood of blocking-prerender / instant validation errors, run the cache-components-instant-false codemod, or…
babysit-pr
Babysit a GitHub pull request after creation by continuously polling review comments, CI checks/workflow runs, and mergeability state until the PR is merged/closed or user help is required. Diagnose failures, retry likely flaky failures up to 3 times, auto-fix/push branch-related issues when appropriate, and keep…
imagegen
Generate or edit raster images when the task benefits from AI-created bitmap visuals such as photos, illustrations, textures, sprites, mockups, or transparent-background cutouts. Use when Codex should create a brand-new image, transform an existing image, or derive visual variants from references, and the output…
cpu-profile-analysis
Analyze V8/Chrome CPU profiles (.cpuprofile) and DevTools trace files (Trace-.json). Use when: profiling performance, investigating slow functions, comparing code paths, finding bottlenecks, analyzing timeToRequest, understanding call trees from sampling profiler data, analyzing layout/paint/rendering, investigating…
next-cache-components-optimizer
Drive a Next.js route to instant navigation by setting up an agentic loop, under Cache Components / PPR, on initial load (hard navigation) and client-side navigation (soft navigation). Encode the goal as a failing @next/playwright instant() e2e and work it to green, one verified route at a time; the shipped test then…