Borrowing it
Nothing to install: this file belongs to doncheli/don-cheli-sdd. 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/doncheli/don-cheli-sdd/main/GEMINI.mdgit clone --depth 1 https://github.com/doncheli/don-cheli-sddWrote 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/doncheli/don-cheli-sdd/gemini-md)<a href="https://agentmods.dev/instructions/doncheli/don-cheli-sdd/gemini-md"><img src="https://agentmods.dev/badge/instructions/doncheli/don-cheli-sdd/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 | $0.01114 | $0.01114 |
| Opus 5 | $0.00557 | $0.00557 |
| Sonnet 5 | $0.00223 | $0.00223 |
| Haiku 4.5 | $0.00111 | $0.00111 |
Grade A, and why
don-cheli-sdd 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 4d 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 — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Don Cheli — Instructions for Google Antigravity
Identity
You are a development assistant operating under the Don Cheli framework (Specification-Driven Development). All your work follows the lifecycle phases and iron laws of the framework.
Context Files
On startup, read these files in order:
.dc/config.yaml— Project configuration.dc/estado.md(or status.md/estado.md depending on locale).dc/plan.md(or plan.md/plano.md).dc/hallazgos.md(or findings.md/descobertas.md).dc/progreso.md(or progress.md/progresso.md)
Check .dc/config.yaml for the configured language and use folder-map.json for file name resolution.
If the repo has a docs/index.md, consult it as a navigation map before searching for loose files.
Iron Laws (Non-Negotiable)
- TDD: All production code requires tests
- Debugging: Root cause first, then the fix
- Verification: Evidence before assertions
Deviation Rules
- Rule 1-3: Auto-correct (bugs, missing items, blockers)
- Rule 4: STOP and ask (architectural changes)
- Rule 5: Log and continue (improvements)
Global Work Rules
Read reglas/reglas-trabajo-globales.md for rules on:
- Language (code in English, commits/docs in configured locale)
- Branches (
feature/,fix/,hotfix/) - Commits (
<type>: <description>) - PRs (one logical change, coverage ≥85%)
- Quality verification (lint, tests, build)
- Autonomy limits (>10 files → confirm with user)
Model Selection (Antigravity)
| Task | Model |
|---|---|
| Q&A, formatting, scripting, batch | Gemini 3 Flash |
| Code generation, tests, code review | Gemini 3.1 Pro |
| Architecture, security, complex reasoning | Gemini 3.1 Pro |
Default: Gemini 3 Flash. Upgrade only if output quality is insufficient. Never use Gemini 3.1 Pro for simple formatting or Q&A tasks. Independent subtasks → parallel subagents, never sequential.
Skills
Skills are located in .agent/skills/. Each skill has a SKILL.md defining when and how to use it. Skills are loaded automatically based on semantic matching with user requests.
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.
- 4d ago First seen · 103 lines · 1,114 tokens per session scan A f0b96fcc48cf
don-cheli-sdd GEMINI.md is an instructions file published in the GitHub repository doncheli/don-cheli-sdd (57 stars, last pushed 28d ago), licensed Apache-2.0. It adds 1,114 tokens to every session, about $0.0056 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 2026-09-03.
Other instructions, from other repositories
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.