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repo for storing the second brain project
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913d4f0335
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Travis Herbranson 913d4f0335 deploy/tower + claim race + transcribe smoke tests 
deploy/tower/:
- second-brain-transcribe.service — systemd unit. User=herbyadmin,
  Type=simple, After=/Wants= wg-quick@wg-lan.service so the WG tunnel
  must come up first. Restart=always with a StartLimitBurst guard.
- second-brain-transcribe.env.example — env file template documenting
  the SECOND_BRAIN_DATABASE_URL form for db.wg.herbylab.dev (10.99.0.1)
  and the optional WHISPER_* overrides.
- README.md — EndeavourOS install steps (nvidia/cuda/cudnn, ffmpeg, uv
  + tower extra, model pre-warm), WG topology reference, validation
  checklist for what to confirm once the tunnel is live, and a
  follow-ups section flagging the local-disk → NAS media migration as
  out-of-scope-for-this-round.

Tests:
- tests/test_claim.py — live-DB race test. Two threads call
  claim_next_source against a single PULLED video row; SKIP LOCKED
  must give exactly one of them the row, the other gets None. Also
  asserts the claimed_by/at columns land + release nulls them.
  Auto-skips when no SECOND_BRAIN_DATABASE_URL is set.
- tests/test_transcribe.py — pure-Python coverage of resolve_settings
  (cpu→int8, cuda→float16, env-over-block) and write_srt; plus a CPU
  smoke test that synthesizes a numpy audio array and runs the `tiny`
  model on cpu/int8 (auto-skipped when faster-whisper isn't installed,
  i.e. on the dev side without --extra tower).
2026-05-25 10:20:46 -04:00
alembic pipeline split: tower transcribe worker + claim queue + faster-whisper 2026-05-25 10:11:37 -04:00
config postgres migration: schema, models, embeddings, alembic 2026-05-24 22:46:48 -04:00
deploy/tower deploy/tower + claim race + transcribe smoke tests 2026-05-25 10:20:46 -04:00
prompts project init 2026-05-22 19:08:22 -04:00
reviews docs: update CLAUDE.md + migration plan to reflect shipped Postgres design 2026-05-24 22:57:31 -04:00
src/second_brain pipeline split: tower transcribe worker + claim queue + faster-whisper 2026-05-25 10:11:37 -04:00
tests deploy/tower + claim race + transcribe smoke tests 2026-05-25 10:20:46 -04:00
.gitignore add .gitignore 2026-05-24 21:10:53 -04:00
alembic.ini postgres migration: schema, models, embeddings, alembic 2026-05-24 22:46:48 -04:00
CLAUDE.md docs: update CLAUDE.md + migration plan to reflect shipped Postgres design 2026-05-24 22:57:31 -04:00
postgres-migration-planning.md docs: update CLAUDE.md + migration plan to reflect shipped Postgres design 2026-05-24 22:57:31 -04:00
pyproject.toml pipeline split: tower transcribe worker + claim queue + faster-whisper 2026-05-25 10:11:37 -04:00
README.md updates to project files 2026-05-24 22:23:59 -04:00
uv.lock pipeline split: tower transcribe worker + claim queue + faster-whisper 2026-05-25 10:11:37 -04:00

README.md

second-brain

A personal knowledge system built on a video/article extraction pipeline and an LLM-maintained wiki (inspired by the Karpathy LLM Wiki pattern).

What it does

  1. Pull — download YouTube videos or fetch web articles
  2. Transcribe — extract transcripts via Whisper (videos) or trafilatura (articles)
  3. Extract — single-shot Claude call produces structured notes per source
  4. Review — web UI to accept or reject extractions
  5. Compile — wiki compiler folds accepted extractions into a living Obsidian vault

Quick start

# Install dependencies
uv sync

# Copy and edit config
cp config/settings.toml config/settings.local.toml

# Queue a source
uv run second-brain add https://www.youtube.com/watch?v=...

# Run the pipeline
uv run second-brain process

# Review in the web UI
uv run second-brain serve

# Compile to wiki
uv run second-brain compile

Domains

Extractions are tagged by domain so the right prompt template is used:

Domain Focus
development Software, programming, systems
content Content creation, video production
business Entrepreneurship, marketing, ops
homelab Self-hosted infra, networking, DevOps

Extractor backends

Two backends, selectable via [extractor].backend in config/settings.toml:

  • cli (default) — shells out to claude -p --output-format json --json-schema .... Runs under your Max OAuth subscription, no per-token billing. The wrapper spawns the CLI in a throwaway tempfile.TemporaryDirectory and strips ANTHROPIC_API_KEY / ANTHROPIC_AUTH_TOKEN from the env so host CLAUDE.md, hooks, and settings don't leak in, and the subscription is used instead of the API key.
  • api — uses the anthropic Python SDK, requires ANTHROPIC_API_KEY. Install with uv sync --extra api (the SDK is an optional dependency).

Requirements

  • Python 3.12+
  • Either the claude CLI on PATH (default backend) or ANTHROPIC_API_KEY (api backend)
  • ffmpeg (for Whisper audio extraction)

In-flight work

  • Postgres + pgvector migration — SQLite is the current backing store but the project is moving to Travis's Postgres instance. Planning questions live in postgres-migration-planning.md; nothing has been migrated yet.