What is session-review?

A review of one AI coding session that finds where time was lost and turns proven lessons into changes to the repository's map file. That map file is the instruction document loaded into future sessions.

Use it to inspect a Claude Code or Codex transcript and improve CLAUDE.md, AGENTS.md, or GEMINI.md with the smallest useful correction.

Repeated searches, failed commands, and unreadable command output can slow later sessions too. This connects changes to evidence from an actual transcript instead of guessing.

session-review — Skill for Claude Code and Codex by V-Songbird/slag

Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code

/plugin marketplace add V-Songbird/slag

Claude Code

/plugin install anneal

Made for: Claude Code, Codex.

Or install anneal, the plugin that ships this one along with the rest of its 4 skills, 1 agent, 2 hooks.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/v-songbird/slag/session-review/github.svg)](https://agentmods.dev/skills/v-songbird/slag/session-review)

Your own site

<a href="https://agentmods.dev/skills/v-songbird/slag/session-review"><img src="https://agentmods.dev/badge/skills/v-songbird/slag/session-review/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/v-songbird/slag/session-review"><img src="https://agentmods.dev/badge/skills/v-songbird/slag/session-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 5,342 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00046	$0.05342
Opus 5.5	$0.00018	$0.02137
Sonnet 5.5	$0.00009	$0.01068
Haiku 4.5	$0.00005	$0.00534

Measured 4d ago against content hash 2d7aa6492d95, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

session-review 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 4d 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.

anneal/skills/session-review/SKILL.md · 193 lines

How it starts

The opening of the file, as written. The whole thing — 193 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Session review

Find where one session lost time, and make the smallest change to this repository's map file that stops the next session losing it again. Prefer a replacement to an addition. No change is a valid result.

The map file is the instruction file the host loads into every session: CLAUDE.md, AGENTS.md or GEMINI.md. What belongs in each of its sections, and what stays out of it, is in the map file skeleton. Read that file before drafting a change.

Argument: $ARGUMENTS. A host that does not fill that in leaves it as written; read the argument from the request instead. When it is a path, it is the transcript to audit. With no argument, the session to audit is this one.

Argument	What runs
none, or a transcript path	the one-session audit: steps 1 to 6 below
`all`, alone or before a sessions folder or transcript paths	the many-sessions pass only: read that file and follow it, and skip steps 1 to 6
`closeout`, before a session id or a transcript path	Close-out only, and skip steps 1 to 6

One session shows where it lost time; it cannot tell a pattern from an accident. Many sessions show what repeats: the same command, lookup or prompt, and the same navigation candidate in several sessions.

What differs by host

	Claude Code	Codex	Antigravity
The plugin's own files	`${CLAUDE_PLUGIN_ROOT}/`	resolve `../../` from this `SKILL.md`	resolve `../../` from this `SKILL.md`
Finding this session's transcript	the script finds it	the script finds it	no known location; ask the owner for a file
Asking the owner to choose	`AskUserQuestion`, `multiSelect`	ask in the reply and wait	`ask_question`, `is_multi_select`

On Antigravity, give every command the project root the person named as its working directory, the Cwd of run_command. Without it, commands can run in Antigravity's own scratch directory instead of the project. When the person named no project root, ask for it before running anything.

Read the full file on GitHub · 193 lines

Files

What ships with it

4 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.

4d ago Changed · +9 lines · +15 tokens per session 2d7aa6492d95
9d ago Changed · -2 lines · -138 tokens per session 192539b310c5
10d ago Changed · +29 lines · +38 tokens per session 1e9a9e67b39b
1mo ago Changed · +2 lines 7784da81fcce
1mo ago Changed · +39 lines b470a46d79f5
1mo ago First seen · 116 lines · 131 tokens per session scan A c9ca1f3ea40c

Subscribe to this mod's changes

session-review is a skill published in the GitHub repository V-Songbird/slag (1 stars, last pushed today), licensed MIT. It adds 46 tokens to every session and 5,342 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-09-23.

Building agents Productivity

session-review next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
session-reviewV-Songbird/slag	Skill	1	today	MIT	A	46	Claude Code, Codex
orbit-notionnexu-io/open-design	Skill	108k	today	Apache-2.0	A	117	Claude Code, Codex
agentmailpaperclipai/paperclip	Skill	114k	today	MIT	A	30	Claude Code, Codex
rowboat-spacesrowboatlabs/rowboat	Skill	18k	yesterday	Apache-2.0	A	60	Claude Code, Codex
Cortexdanielmiessler/LifeOS	Skill	20k	9d ago	MIT	A	184	Claude Code
pinchtab-mcppinchtab/pinchtab	Skill	11k	4d ago	MIT	A	52	Claude Code, Codex
feishuHmbown/CodeWhale	Skill	41k	7d ago	MIT	A	33	Claude Code, Codex