self-improvement

A session-review tool that checks recorded learnings and adds the useful ones to CLAUDE.md, the file that stores project instructions for Claude. It records each decision in CHANGELOG.md so changes can be reversed.

In plain words
What is it for?
Use it to review pending entries in the learnings folder, promote selected lessons into CLAUDE.md, and maintain a history of those changes.
Why use it?
It removes the need to review and copy useful lessons by hand after each session. It also keeps weak or unnecessary notes out of the main instructions.

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/trtmn/agent-plugins/self-improvement
Any agent
npx skills add trtmn/agent-plugins --skill self-improvement
Clone the repo
git clone --depth 1 https://github.com/trtmn/agent-plugins

Made for: Claude Code, Codex.

Per session 132 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,944 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 $0.00132 $0.01944
Opus 5 $0.00066 $0.00972
Sonnet 5 $0.00026 $0.00389
Haiku 4.5 $0.00013 $0.00194

Measured 2d ago against content hash 58b0ad3b008c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

self-improvement 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.

plugins/self-improvement/skills/self-improvement/SKILL.md · 129 lines

How it starts

The opening of the file, as written. The whole thing — 129 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Self-Improvement

The review + auto-promote half of the learning loop. Capture is handled separately by the learnings skill, which writes pending entries to ~/.learnings/ continuously. This skill is the deliberate-but-autonomous half: it investigates each pending entry, promotes the ones that clear a conservative bar into CLAUDE.md, and records every decision in CHANGELOG.md so the active log stays clean and every promotion is reversible.

It closes the loop so Claude gets better as you keep using it — no manual step required.

How it runs

One pipeline, one behavior, two triggers. The pipeline never branches on who called it — it always runs non-interactively and auto-promotes. That single invocation model is what makes it safe to run headless (an approval prompt in an unattended process would deadlock).

Trigger How
Autonomous (primary) A gated SessionEnd hook (~/.claude/self-improvement/review-trigger.sh) checks the user-level pending count; if it's ≥ REVIEW_THRESHOLD and the cooldown has elapsed and no review holds the lock, it spawns a detached, headless claude -p review that runs the pipeline in its own process — zero cost to your live session.
Manual /self-improvement runs the same pipeline in the foreground so you can watch promotions happen and intervene.

Undo any promotion with /self-improvement:revert <PROMO-hex>.

Relationship to learnings

learnings self-improvement
Who invokes Main Claude, autonomously, on every trigger SessionEnd hook (headless) or the user (/self-improvement)
When Continuously After a session ends (if enough piled up), or on demand
Does Appends pending entries to ~/.learnings/ Investigates, auto-promotes qualifiers, logs to CHANGELOG
Behavior Pure capture Non-interactive auto-promote + revertible trail

The pipeline (run by the self-improvement agent)

  1. Sweep (if given a session transcript path) for learnings passive capture missed; write them as Status: pending using the learnings entry formats.
  2. Read all Status: pending entries from ~/.learnings/{LEARNINGS,ERRORS,FEATURE_REQUESTS}.md. (Manual runs also read the project .learnings/ mirror; autonomous runs do not — see Scope.)
  3. Investigate each candidate with a learning-investigator subagent — one per entry, dispatched as concurrent foreground calls (parallel but blocking; never run_in_background, which would let the orchestrator yield before verdicts return). Collect every verdict before acting.
  4. Act: auto-promote verdicts that clear the bar (append to target CLAUDE.md, [PROMO-<hex>] to CHANGELOG, remove from pending); [SKIP-<hex>] clear rejects; leave uncertain/project-scoped entries pending. Enforce MAX_PROMOTIONS_PER_RUN.
  5. Notify via a single Pushover summary.
  6. Report the same summary to stdout (lands in .review.log for headless runs).

Read the full file on GitHub · 129 lines

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 · 129 lines · 132 tokens per session scan A 58b0ad3b008c

Subscribe to this mod's changes

self-improvement is a skill published in the GitHub repository trtmn/agent-plugins (2 stars, last pushed 5d ago), licensed Unlicense. It adds 132 tokens to every session and 1,944 once invoked, about $0.0007 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 2026-08-31.