Borrowing it
Nothing to install: this file belongs to andr-ca/agentharness. 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/andr-ca/agentharness/main/GEMINI.mdgit clone --depth 1 https://github.com/andr-ca/agentharnessWrote 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/andr-ca/agentharness/gemini-md)<a href="https://agentmods.dev/instructions/andr-ca/agentharness/gemini-md"><img src="https://agentmods.dev/badge/instructions/andr-ca/agentharness/gemini-md.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 5.1 | $0.07555 | $0.07555 |
| Opus 5 | $0.03778 | $0.03778 |
| Sonnet 5 | $0.01511 | $0.01511 |
| Haiku 4.5 | $0.00756 | $0.00756 |
Grade A, and why
agentharness GEMINI.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 2d 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.
This is a copy
95% identical to agentharness copilot-instructions.md — 31 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 438 lines — stays where its author put it; the contents beside it link to each section on GitHub.
GEMINI.md
Generated from this repo's own CLAUDE.md by tools/generate-gemini-md.sh
(https://github.com/andr-ca/agentharness) — do not hand-edit; regenerate instead
(tools/generate-gemini-md.sh --output GEMINI.md). A CI check keeps this
file in sync with its source (see .github/workflows/ci.yml's
content-quality job).
This file covers repo-wide routing rules only. Skills are loaded on
demand from .agents/skills/ — Gemini CLI's real skill mechanism (the
Agent Skills open standard, shared with Claude Code) injects every
enabled skill's name/description metadata into the system prompt at
session start, then loads a skill's full body only once its description
matches the task at hand (via its activate_skill tool). Google
Antigravity reads this same filename and gives it precedence over
AGENTS.md when both exist. The index below exists so that
metadata-scan step has something to match against; it is not a
substitute for reading the matched SKILL.md itself.
Gemini CLI also supports /memory show (inspect the concatenated
context) and /memory refresh (force a re-scan) if this file changes
mid-session.
agentharness – Agent Router
This file is loaded into every session that touches this repo. Keep it short — everything else is one link away. Full index: MANIFEST.md. Planned-but-not-built: ROADMAP.md.
🤖 Agent Workflow Completion
Default (no publish authority): verify and stage, then stop.
- ✅ Run the completion gate — before declaring any work done, run
bash tools/check-completion.sh. This script verifies lint, types, tests, coverage, and content quality in one shot and exits non-zero if anything fails. The Stop hook in.github/hooks/completion-gate.jsonand.claude/settings.jsonenforces this automatically for Claude Code and GitHub Copilot — the agent cannot stop until all gates pass. - ✅ Create atomic commits locally — one logical unit per commit, clear message explaining WHY
- 🛑 Stop before pushing, opening a PR, or auto-implementing recommendations. Present a summary of what's staged and ask the user to confirm before publishing anything.
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.
- 2d ago First seen · 438 lines · 7,555 tokens per session scan A 3b52da359112
agentharness GEMINI.md is an instructions file published in the GitHub repository andr-ca/agentharness (1 stars, last pushed 3d ago), licensed MIT. It adds 7,555 tokens to every session, about $0.0378 per session on Opus 5. A static security scan graded it A with 0 findings. It is 95% identical to agentharness copilot-instructions.md, differing in 31 lines, and is treated as a copy.
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