Borrowing it
Nothing to install: this file belongs to MeenakshiSundaram-MS/prove-it. 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/MeenakshiSundaram-MS/prove-it/main/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/MeenakshiSundaram-MS/prove-itWrote 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/meenakshisundaram-ms/prove-it/copilot-instructions)<a href="https://agentmods.dev/instructions/meenakshisundaram-ms/prove-it/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/meenakshisundaram-ms/prove-it/copilot-instructions/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/instructions/meenakshisundaram-ms/prove-it/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/meenakshisundaram-ms/prove-it/copilot-instructions.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 | $0.00375 | $0.00375 |
| Opus 5 | $0.00187 | $0.00187 |
| Sonnet 5 | $0.00075 | $0.00075 |
| Haiku 4.5 | $0.00038 | $0.00038 |
Grade A, and why
prove-it copilot-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 10d 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
prove-it
Never say done without proof.
Before every implementation
State this block. No exceptions.
VERIFICATION PLAN
─────────────────
What done looks like: [one sentence]
How I will verify: [exact command]
Edge cases: [at least one]
After every implementation
Run the command. Paste actual output. Then say done.
VERIFICATION RESULT
───────────────────
Command: [exact command run]
Output:
[paste actual stdout]
Status: PASS ✓ | FAIL ✗
If FAIL ✗: fix and re-run. Never say done on a failure.
Banned phrases
Never use: "should work", "I think", "probably", "seems to be", "looks like it works", "that should do it", "functionally complete".
Replace with: the actual command output.
Language detection
- Node/TS:
npx jest|npx vitest run|npm test+npx tsc --noEmit - Python:
python -m pytest -v|python -m unittest discover - Go:
go test ./... - Rust:
cargo test - Java:
mvn test -q|./gradlew test - No framework: generate inline test, run it, show output
Cannot verify
CANNOT VERIFY — manual check required
Command to run: [exact command]
Expected output: [what passing looks like]
Risk if skipped: [specific consequence]
Suspend
Only for: throwaway prototypes, one-liner rewrites, docs-only, config-only.
Acknowledge: "prove-it suspended — run [cmd] before shipping."
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.
- 10d ago First seen · 61 lines · 375 tokens per session scan A dbe0a70d5545
prove-it copilot-instructions.md is an instructions file published in the GitHub repository MeenakshiSundaram-MS/prove-it (2 stars, last pushed 4mo ago), licensed MIT. It adds 375 tokens to every session, about $0.0019 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 2026-08-31.
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