session-review

session-review is a skill for Claude Code from Kastalien-Research/thoughtbox. It costs 46 tokens per session (973 once invoked), scanned A, original, MIT.

A structured record of a coding session’s decisions, open questions, unfinished work, and useful discoveries.

In plain words
What is it for?
Reviewing recent commits and changes, checking project memory, and writing a handoff file for the next session.
Why use it?
It preserves enough context for work to continue reliably in a later session.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: installed under .agents/ (shared by several agents); mentions Codex.

Good fit Reviewing recent commits and changes, checking project memory, and writing a handoff…

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/kastalien-research/thoughtbox/session-review
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.

Any agent
npx skills add Kastalien-Research/thoughtbox --skill session-review
Clone the repo
git clone --depth 1 https://github.com/Kastalien-Research/thoughtbox

Made for: Claude Code.

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.

agentmods badge for session-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/kastalien-research/thoughtbox/session-review.svg)](https://agentmods.dev/skills/kastalien-research/thoughtbox/session-review)
Your own site
<a href="https://agentmods.dev/skills/kastalien-research/thoughtbox/session-review"><img src="https://agentmods.dev/badge/skills/kastalien-research/thoughtbox/session-review.svg" alt="Measured on agentmods" 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 973 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00046 $0.00973
Opus 5 $0.00023 $0.00487
Sonnet 5 $0.00009 $0.00195
Haiku 4.5 $0.00005 $0.00097

Measured 7d ago against content hash 6c9fae37ef56, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, 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 7d 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.

.agents/skills/session-review/SKILL.md · 133 lines

How it starts

The opening of the file, as written. The whole thing — 133 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Generate a structured session summary for cross-session continuity.

Context

$ARGUMENTS

Loop Building Blocks

Loop Purpose Reference
Consistency Check Validate session summary against evidence @loops/refinement/consistency-check.md
Documentation Generate structured session review @loops/authoring/documentation.md

See @loops/README.md for the full loop library.

Workflow

Phase 1: Gather Session State (Observe)

  1. Run git log --oneline -20 to see recent commits this session
  2. Run git status to see uncommitted work
  3. Run git diff --stat to see scope of changes
  4. Check .Codex/state/memory-calibration.json for pattern detection state
  5. Read MEMORY.md for any updates made this session

Phase 2: Synthesize Session Context (Orient)

From the gathered data, identify:

  1. Key Decisions: What architectural or design choices were made and why
  2. Open Hypotheses: What questions remain unanswered, what investigations are pending
  3. Partial Work: What was started but not finished, with enough context to resume
  4. Knowledge Discovered: New patterns, gotchas, or insights worth preserving
  5. Blocked Items: What's blocked and on what
  6. Next Steps: What the next session should prioritize

Phase 3: Write Session Handoff (Act)

Write the session summary to .Codex/session-handoff.json (single file, overwritten each time) using this schema:

{
  "version": "1.0.0",
  "session_id": "<from git>",
  "timestamp": "<ISO 8601>",
  "branch": "<current git branch>",
  "duration_estimate": "<approximate session duration>",
  "summary": "<1-2 sentence summary of what happened>",
  "key_decisions": [
    {
      "decision": "<what was decided>",
      "reasoning": "<why>",
      "alternatives_considered": ["<alt1>", "<alt2>"],
      "files_affected": ["<file1>", "<file2>"]
    }
  ],
  "hypotheses": [
    {
      "hypothesis": "<what's being investigated>",
      "evidence_for": ["<supporting evidence>"],
      "evidence_against": ["<counter evidence>"],
      "next_test": "<what to try next>"
    }
  ],
  "partial_work": [
    {
      "description": "<what was started>",
      "status": "<how far along>",
      "resume_from": "<specific file:line or commit to resume from>"
    }
  ],
  "knowledge_references": [
    {
      "store": "<MEMORY.md | Thoughtbox | git>",
      "reference": "<specific entity/issue/commit>",
      "relevance": "<why the next session needs this>"
    }
  ],
  "blocked_items": [
    {
      "item": "<what's blocked>",
      "blocker": "<what's blocking it>",
      "workaround": "<if any>"
    }
  ],
  "failed_approaches": [
    {
      "what": "<what was tried>",
      "why": "<why it failed>",
      "lesson": "<what to do instead>"
    }
  ],
  "next_priorities": ["<priority 1>", "<priority 2>", "<priority 3>"],
  "warnings": ["<things the next session should watch out for>"]
}

Read the full file on GitHub · 133 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. 7d ago First seen · 133 lines · 46 tokens per session scan A 6c9fae37ef56

Subscribe to this mod's changes

session-review is a skill published in the GitHub repository Kastalien-Research/thoughtbox (64 stars, last pushed 1mo ago), licensed MIT. It adds 46 tokens to every session and 973 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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