Borrowing it
Nothing to install: this file belongs to codingagentsystem/cas. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/codingagentsystem/cas/main/.claude/agents/session-summarizer.mdgit clone --depth 1 https://github.com/codingagentsystem/casWrote 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.
[](https://agentmods.dev/agents/codingagentsystem/cas/session-summarizer)<a href="https://agentmods.dev/agents/codingagentsystem/cas/session-summarizer"><img src="https://agentmods.dev/badge/agents/codingagentsystem/cas/session-summarizer/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.
<a href="https://agentmods.dev/agents/codingagentsystem/cas/session-summarizer"><img src="https://agentmods.dev/badge/agents/codingagentsystem/cas/session-summarizer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00036 | $0.00484 |
| Opus 5.5 | $0.00014 | $0.00194 |
| Sonnet 5.5 | $0.00007 | $0.00097 |
| Haiku 4.5 | $0.00004 | $0.00048 |
Grade A, and why
session-summarizer 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 2mo 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.
What it actually says
Generate a concise session summary (<500 words) optimized for the next session to resume quickly.
Process
- Get session context:
mcp__cas__search action=context - List tasks touched:
mcp__cas__task action=mine - Get recent memories:
mcp__cas__memory action=recent limit=20 - Check for open/in-progress tasks:
mcp__cas__task action=list status=in_progress - Create summary with this structure:
## Session Summary - [Date]
### Completed
- [task-id] [title]: [one-line outcome]
### In Progress
- [task-id] [title]: [current state, what's left, where to resume]
- Last file edited: [path]
- Next step: [specific action]
### Blocked
- [task-id] [title]: [blocker description, who/what can unblock]
### Key Decisions
- [decision and reasoning — most valuable for future context]
### Learnings Captured
- [learning-id]: [brief description]
### Next Session Should
1. [Most important first action]
2. [Second action]
- Store summary:
mcp__cas__memory action=remember content="<summary>" title="Session Summary - [Date]" entry_type=context tags="session,summary"
Guidelines
- Focus on outcomes, not process details ("Added validation to handler" not "Read the file, then edited it")
- Highlight decisions — most valuable for future context, include the why not just the what
- Be specific about resumption points — "Continue from src/store.rs:145, need to add the migration" not "Continue working on the store"
- Note blockers with enough detail to unblock without re-investigation
- Reference task IDs for traceability
- Don't summarize tool calls or conversation flow — summarize results
- If work was rejected by the verifier, note what was rejected and why
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.
- 2mo ago First seen · 57 lines · 36 tokens per session scan A d55e20f86eb0
session-summarizer is an agent published in the GitHub repository codingagentsystem/cas (177 stars, last pushed 7mo ago), licensed MIT. It adds 36 tokens to every session and 484 once invoked, about $0.0001 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 2026-08-30.
session-summarizer compared with agents from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| session-summarizercodingagentsystem/cas | Agent | 177 | 7mo ago | MIT | A | 36 | Claude Code |
| seancecan1357/oh-my-pi | Agent | 38k | yesterday | MIT | A | 15 | Claude Code |
| architecture-reviewercogniplex/codemem | Agent | 18 | 3mo ago | Apache-2.0 | A | 51 | Claude Code |
| estelle-historianuqeu/estelle-cli | Agent | 0 | 2d ago | Apache-2.0 | A | 54 | Claude Code |
| devops-engineeranrylu/soul-forge | Agent | 1 | 7mo ago | none | A | 10 | Claude Code |
| frontend-developeranrylu/soul-forge | Agent | 1 | 7mo ago | none | A | 7 | Claude Code |
| security-reviewerJSK9999/ai-nexus | Agent | 19 | 8mo ago | Apache-2.0 | A | 52 | Claude Code |