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.
npx skills add hoavdc/CodexKit --skill codexkit-document-summarizergit clone --depth 1 https://github.com/hoavdc/CodexKitWrote 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/skills/hoavdc/codexkit/codexkit-document-summarizer)<a href="https://agentmods.dev/skills/hoavdc/codexkit/codexkit-document-summarizer"><img src="https://agentmods.dev/badge/skills/hoavdc/codexkit/codexkit-document-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/skills/hoavdc/codexkit/codexkit-document-summarizer"><img src="https://agentmods.dev/badge/skills/hoavdc/codexkit/codexkit-document-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 | $0.00050 | $0.00838 |
| Opus 5.5 | $0.00020 | $0.00335 |
| Sonnet 5.5 | $0.00010 | $0.00168 |
| Haiku 4.5 | $0.00005 | $0.00084 |
Grade A, and why
codexkit-document-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.
How it starts
The opening of the file, as written. The whole thing — 116 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Document Summarizer
When to Use
- Summarizing long documents that are not formal business reports.
- Extracting key points from policies, proposals, PDFs, research notes, or document packets.
- Preparing a quick readout before deciding whether to read the full document.
- Comparing multiple documents for themes, contradictions, or action items.
Procedure
Step 1 - Identify Document Type
Classify the source: policy, proposal, memo, research, contract-like document, transcript, academic paper, operating document, or mixed packet.
Step 2 - Extract Core Content
Capture:
- purpose
- main claims or findings
- dates, parties, obligations, or deadlines
- decisions requested
- open questions
- risks or caveats
Step 3 - Separate Summary From Interpretation
Keep source-backed summary separate from analysis or recommendation. Mark anything inferred.
Step 4 - Produce Audience-Specific Output
Adapt format for executive, manager, student, legal/compliance reviewer, or team member.
Step 5 - Add Reading Guidance
State which sections deserve human review and why.
Inputs
| Input | Required | Format |
|---|---|---|
| Document text or excerpt | Yes | Pasted text, extracted notes, OCR |
| Document type | Recommended | Proposal, policy, memo, research, etc. |
| Audience | Recommended | Executive, manager, student, team |
| Desired length | Optional | 5 bullets, one page, detailed brief |
| Focus area | Optional | Risks, obligations, actions, decisions |
Output
## Document Summary - [Document Name]
### One-Line Takeaway
[Core point]
### Key Points
- [Point backed by source]
### Actions / Decisions
| Item | Owner | Deadline | Source Note |
|------|-------|----------|-------------|
### Risks / Caveats
- [Risk]
### Needs Human Review
- [Section or issue]
Quality Criteria
- The summary stays faithful to the document and does not invent missing facts.
- Important dates, obligations, numbers, and decisions are preserved.
- Source-backed summary is separated from interpretation.
- The output states what was not reviewed or could not be verified.
- High-risk documents are flagged for expert review.
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.
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 · 116 lines · 50 tokens per session scan A 1bc2f5aecd13
codexkit-document-summarizer is a skill published in the GitHub repository hoavdc/CodexKit (26 stars, last pushed 19d ago), licensed MIT. It adds 50 tokens to every session and 838 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 2026-08-30.
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