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/whenlabs-org/when/copilot-instructionsgit clone --depth 1 https://github.com/WhenLabs-org/whenWhat 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 | $0.00632 | $0.00632 |
| Opus 5 | $0.00316 | $0.00316 |
| Sonnet 5 | $0.00126 | $0.00126 |
| Haiku 4.5 | $0.00063 | $0.00063 |
Grade A, and why
when 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 yesterday.
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 — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Project: @whenlabs/when
The WhenLabs developer toolkit — 6 tools, one install
Tech Stack
- Language: TypeScript 5.7
- Testing: Vitest 3.0
- Package Manager: pnpm
- Monorepo: pnpm-workspaces
- Deployment: Docker
- CI/CD: GitHub Actions
- Bundler: tsup 8.0
Docker
Dockerfile Best Practices
- Use multi-stage builds: a
builderstage for compilation/dependencies and a slimrunnerstage for the final image - Copy dependency manifests first (
package.json,package-lock.json) and install before copying source — leverages layer caching - Use specific base image tags (e.g.,
node:20-alpine) — never uselatestin production - Run the application as a non-root user:
RUN adduser --disabled-password appuser && USER appuser
.dockerignore
- Always include a
.dockerignorefile to exclude:node_modules,.git,.env, build artifacts, test files
Layer Caching
Security
Compose
GitHub Actions CI/CD
Workflow Files
- Workflows live in
.github/workflows/as YAML files - Use descriptive names for workflow files (e.g.,
ci.yml,deploy.yml,release.yml) - Pin action versions to a full SHA for security, not just a tag (e.g.,
actions/checkout@<sha>) - Use
workflow_dispatchfor manually triggerable workflows
Best Practices
- Use job-level
concurrencyto cancel in-progress runs on the same branch
Performance
Conventions
Naming
- files: kebab-case
- functions: camelCase
- constants: UPPER_SNAKE_CASE
Imports
- style: named imports preferred
- order: third-party,local,types
Extracted
- _sampleSize: 200
- _confidence: [object Object]
- naming: [object Object]
- tests: [object Object]
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.
- yesterday First seen · 79 lines · 632 tokens per session scan A 2bb78e6d29f2
when copilot-instructions.md is an instructions file published in the GitHub repository WhenLabs-org/when (3 stars, last pushed 8d ago), licensed MIT. It adds 632 tokens to every session, about $0.0032 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.
Other instructions, from other repositories
syllago CLAUDE.md
Instructions for OpenScribbler/syllago, covering syllago, build and test, key conventions, architectural decisions and testing requirements.
syllago AGENTS.md
Instructions for OpenScribbler/syllago, covering agent instructions, landing the plane (session completion), bv + br (graph-aware triage), entry point and workflow.
ai-workflow AGENTS.md
Instructions for cunhaax/ai-workflow, covering ai workflow template, rules — non-negotiable, project overview, commands and architecture.
trackly-cli CLAUDE.md
Claude Code instructions for trackly-app/trackly-cli, covering trackly-cli, tech stack, backend production source of truth, directory structure and key commands.
com-example-config-AsyncTestConfig
Instructions for PIsberg/vibetags, covering copilot instructions for asynctestconfig and immutable type.
pupila CLAUDE.md
Instructions for FranRom/pupila, covering claude.md, where things live, stack, run locally and repo layout.