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 agentmods add instructions/sbroenne/mcp-server-excel/bug-fixing-checklistgit clone --depth 1 https://github.com/sbroenne/mcp-server-excelWrote 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/instructions/sbroenne/mcp-server-excel/bug-fixing-checklist)<a href="https://agentmods.dev/instructions/sbroenne/mcp-server-excel/bug-fixing-checklist"><img src="https://agentmods.dev/badge/instructions/sbroenne/mcp-server-excel/bug-fixing-checklist.svg" alt="Measured on agentmods" 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 | $0.00301 | $0.00301 |
| Opus 5 | $0.00151 | $0.00151 |
| Sonnet 5 | $0.00060 | $0.00060 |
| Haiku 4.5 | $0.00030 | $0.00030 |
Grade A, and why
mcp-server-excel bug-fixing-checklist.instructions.md 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 5d 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
Bug-fix workflow
- Trace the failure from the user entry point through generated routing, Service, Core, and Excel COM. State the root cause before choosing a fix.
- Search sibling commands, fallback/retry branches, both entry points, tests, guidance, and generated/template sources for the same pattern.
- Add the smallest regression test that reproduces the bug and observe it fail.
- Fix the root cause at the owning layer without changing unrelated behavior.
- Rerun the regression test, then the smallest related test group.
- Update only documentation, help, descriptions, or workflow hints affected by the behavior change.
- Run the applicable repository audit scripts and summarize the root cause, same-pattern findings, behavior change, and validation in the pull request.
There is no fixed quota for tests or documentation files. Coverage must be proportional to the defect: include the reported case, meaningful boundary or error cases, and cross-entry-point coverage where the contract crosses CLI/MCP.
Do not:
- Fix only the visible symptom while another branch retains the same defect.
- Assert only
Success; verify the resulting workbook or response state. - Add broad catches, silent defaults, or retries without a bounded condition.
- Hand-edit generated artifacts instead of their source.
- Create a separate investigation or summary document in the repository.
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.
- 5d ago First seen · 31 lines · 301 tokens per session scan A 479b29158ffe
mcp-server-excel bug-fixing-checklist.instructions.md is an instructions file published in the GitHub repository sbroenne/mcp-server-excel (656 stars, last pushed today), licensed MIT. It adds 301 tokens to every session, about $0.0015 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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