agentmemory-hooks

Automatic hooks for recording what happens during a coding-agent session. They capture prompts, tool activity, session boundaries, context before trimming, and links between commits and sessions.

In plain words
What is it for?
Capturing session observations, preserving context, and connecting commits to the work that produced them. The hooks can also show observations in a local viewer.
Why use it?
They preserve useful work history without requiring the developer or agent to save every observation manually. This makes later memory search and session handoffs possible.

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/rohitg00/agentmemory/agentmemory-hooks
Any agent
npx skills add rohitg00/agentmemory --skill agentmemory-hooks
Clone the repo
git clone --depth 1 https://github.com/rohitg00/agentmemory

Made for: Claude Code, Codex.

Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 371 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original 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 $0.00042 $0.00371
Opus 5 $0.00021 $0.00186
Sonnet 5 $0.00008 $0.00074
Haiku 4.5 $0.00004 $0.00037

Measured 2d ago against content hash 1ce38dac7869, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

agentmemory-hooks 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.

Origin

Copies of this mod

2 near-identical copies found in the catalogue:

plugin/skills/agentmemory-hooks/SKILL.md · 40 lines

What it actually says

The Claude Code plugin registers lifecycle hooks so memory is captured automatically. You do not have to call memory_save for routine work; the hooks observe tool use, prompts, and session boundaries and write observations for you.

Quick start

Install the plugin and the hooks register themselves:

/plugin marketplace add rohitg00/agentmemory
/plugin install agentmemory

Watch observations land live at http://localhost:3113.

What the hooks do

  • Session start and end frame each unit of work and let handoff resume it.
  • Tool-use hooks capture what changed and why, the raw material for recall and recap.
  • Prompt-submit captures intent. Pre-compact preserves context before the host trims it.
  • A post-commit hook links commits to sessions, which powers commit-context and commit-history.

Important

  • Capture is on by default and is zero-LLM. Turning observations into LLM summaries (AGENTMEMORY_AUTO_COMPRESS) and injecting them back into context (AGENTMEMORY_INJECT_CONTEXT) are separate opt-ins because they spend tokens.
  • If observations are missing, confirm the plugin is enabled and the server is running. See ../_shared/TROUBLESHOOTING.md.

See also

  • agentmemory-config for the capture and injection flags.
  • The handoff, recap, and session-history skills consume what these hooks record.

Reference

The exact registered hook events live in REFERENCE.md, generated from plugin/hooks/hooks.json.

Files

What ships with it

1 file 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 · 40 lines · 42 tokens per session scan A 1ce38dac7869

Subscribe to this mod's changes

agentmemory-hooks is a skill published in the GitHub repository rohitg00/agentmemory (27,906 stars, last pushed 2d ago), licensed Apache-2.0. It adds 42 tokens to every session and 371 once invoked, about $0.0002 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.

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