auto-capture-claude-code

A Claude Code adapter for automatically saving meaningful coding-session transcripts to Open Brain when the session ends.

In plain words
What is it for?
It adds automatic session-end capture to the auto-capture workflow in Claude Code.
Why use it?
It preserves work without relying on someone to remember to request a summary or say that the session is finished.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/natebjones-projects/ob1/auto-capture-claude-code
Any agent
npx skills add NateBJones-Projects/OB1 --skill auto-capture-claude-code
Clone the repo
git clone --depth 1 https://github.com/NateBJones-Projects/OB1

Made for: Claude Code, Codex.

Per session 70 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,178 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What 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.

ModelPer sessionOnce invoked
Fable 5 $0.00070 $0.01178
Opus 5 $0.00035 $0.00589
Sonnet 5 $0.00014 $0.00236
Haiku 4.5 $0.00007 $0.00118

Measured 2d ago against content hash cfb2203a1dfc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

auto-capture-claude-code scanned grade B with 1 finding 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.

The scan reads SKILL.md. This mod also ships 1 executable file (session-end-capture.mjs), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

global `~/.claude/settings.json`):
skills/auto-capture-claude-code/SKILL.md · 140 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

  1. 2d ago First seen · 140 lines · 70 tokens per session scan B cfb2203a1dfc

Subscribe to this mod's changes

auto-capture-claude-code is a skill published in the GitHub repository NateBJones-Projects/OB1 (4,528 stars, last pushed today), with no licence file. It adds 70 tokens to every session and 1,178 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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