agent-context-engineering

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Mis à jour15 juillet 2026 à 02:54

Author and maintain agent context markdown — AGENTS.md, rules, skills, memory files. Use when creating, editing, or refactoring any agent-focused doc, or after major codebase exploration to capture learning.

Installation

Installer avec Codex ou Claude Copiez ce prompt, collez-le dans Codex, Claude ou un autre assistant, puis laissez-le vérifier la page du skill et l'installer pour vous.

Source

gwenwindflower

gwenwindflower/dotfiles

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Métiers associésSOC

Basé sur la classification professionnelle SOC

Développeurs de logicielsProfessions informatiques et mathématiques·SOC 15-1252

SKILL.md

readonly

name	agent-context-engineering
description	Author and maintain agent context markdown — AGENTS.md, rules, skills, memory files. Use when creating, editing, or refactoring any agent-focused doc, or after major codebase exploration to capture learning.

Agent Context Docs

Every line is loaded on every trigger. If it doesn't change agent behavior, cut it.

[!NOTE] AGENTS.md and .agents/ are both real and stand-ins. They're the shared cross-agent standard adopted by most non-Claude tools, and the generic model for agent-specific equivalents (CLAUDE.md, GEMINI.md, .codex/, etc.). Guidance here applies to all of them.

Principles

Specific and actionable. "Use 2-space indentation in TypeScript" beats "format code properly."
Progressive disclosure. Minimal root file; modular detail loaded on demand.
No redundancy. Don't repeat README, package.json, or anything inferable from code.
Living document. Update after significant exploration to prevent re-crawling.

Authoring AGENTS.md

Include only what an agent can't infer from the code:

1–2 sentence project context (what it is, primary stack)
Goals, priorities, non-goals
Project structure — key directories and their purpose (high token value, prevents repeated fd/tree)
Key commands (build, test, lint) when non-obvious
Architecture: non-obvious patterns, key abstractions, data flow
Conventions that diverge from defaults

Exclude generic language idioms, README content, and vague directives ("write clean code").

Index Pattern

The recommended progressive-disclosure approach:

Put modular docs in docs/ with descriptive filenames (adding-shadcn-components.md)
List them as a tight index in AGENTS.md — plain paths, not @-imports

# Shopping App Agent Guidance

docs/adding-shadcn-components.md
docs/using-drizzle-with-supabase.md
docs/adding-v2-api-endpoints.md

The agent picks what to load. For projects with clear splits (frontend/backend), scope subdirectory indexes:

src/frontend/AGENTS.md → src/frontend/docs/...
src/backend/AGENTS.md  → src/backend/docs/...

Rules vs. docs

Type	Purpose	Scope
Rule	How something should be done, always (workflow, conventions)	User-level if global, project-level if specific
Doc	State of something / how it works (API, architecture)	Skill if cross-project, `docs/` if project-specific

Patterns to Avoid

@reference imports. Most agents inline them fully on encounter. Treat as inlined content; recursive loading (Claude Code: depth 5) compounds bloat.
Rules directories. All files load at session start — equivalent to @-importing every file. Reserve for genuinely universal rules.
Path-scoped frontmatter globs. Better than global, but still automatic rather than agent-driven.

Living Document Workflow

After significant work, update AGENTS.md with new structure, patterns, or decisions. Universally relevant → root; area-specific → docs/ with index entry.

Refactoring Overgrown Files

For AGENTS.md past ~60 lines or with poor structure:

Eliminate conflicting or redundant instructions
Group remaining content by function or path
Move detail into docs/ files; add index entries
Justify each remaining line: does every agent in this directory need it every session?

File Locations

Location	Shared With	Loaded
`AGENTS.md` / `.agents/AGENTS.md`	Team (tracked)	Always
`.agents/rules/*.md`	Team (tracked)	Always
`AGENTS.local.md`	User (untracked)	Always
`~/.agents/AGENTS.md`	User (all projects)	Always
`~/.agents/*`	User (all projects)	Varies by agent

MCP Tool References

Use fully qualified names: ServerName:tool_name (e.g., BigQuery:bigquery_schema). Bare tool names may not resolve when many MCP servers are connected.

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name	agent-context-engineering
description	Author and maintain agent context markdown — AGENTS.md, rules, skills, memory files. Use when creating, editing, or refactoring any agent-focused doc, or after major codebase exploration to capture learning.

Agent Context Docs

Every line is loaded on every trigger. If it doesn't change agent behavior, cut it.

[!NOTE] AGENTS.md and .agents/ are both real and stand-ins. They're the shared cross-agent standard adopted by most non-Claude tools, and the generic model for agent-specific equivalents (CLAUDE.md, GEMINI.md, .codex/, etc.). Guidance here applies to all of them.

Principles

Specific and actionable. "Use 2-space indentation in TypeScript" beats "format code properly."
Progressive disclosure. Minimal root file; modular detail loaded on demand.
No redundancy. Don't repeat README, package.json, or anything inferable from code.
Living document. Update after significant exploration to prevent re-crawling.

Authoring AGENTS.md

Include only what an agent can't infer from the code:

1–2 sentence project context (what it is, primary stack)
Goals, priorities, non-goals
Project structure — key directories and their purpose (high token value, prevents repeated fd/tree)
Key commands (build, test, lint) when non-obvious
Architecture: non-obvious patterns, key abstractions, data flow
Conventions that diverge from defaults

Exclude generic language idioms, README content, and vague directives ("write clean code").

Index Pattern

The recommended progressive-disclosure approach:

Put modular docs in docs/ with descriptive filenames (adding-shadcn-components.md)
List them as a tight index in AGENTS.md — plain paths, not @-imports

# Shopping App Agent Guidance

docs/adding-shadcn-components.md
docs/using-drizzle-with-supabase.md
docs/adding-v2-api-endpoints.md

The agent picks what to load. For projects with clear splits (frontend/backend), scope subdirectory indexes:

src/frontend/AGENTS.md → src/frontend/docs/...
src/backend/AGENTS.md  → src/backend/docs/...

Rules vs. docs

Type	Purpose	Scope
Rule	How something should be done, always (workflow, conventions)	User-level if global, project-level if specific
Doc	State of something / how it works (API, architecture)	Skill if cross-project, `docs/` if project-specific

Patterns to Avoid

@reference imports. Most agents inline them fully on encounter. Treat as inlined content; recursive loading (Claude Code: depth 5) compounds bloat.
Rules directories. All files load at session start — equivalent to @-importing every file. Reserve for genuinely universal rules.
Path-scoped frontmatter globs. Better than global, but still automatic rather than agent-driven.

Living Document Workflow

After significant work, update AGENTS.md with new structure, patterns, or decisions. Universally relevant → root; area-specific → docs/ with index entry.

Refactoring Overgrown Files

For AGENTS.md past ~60 lines or with poor structure:

Eliminate conflicting or redundant instructions
Group remaining content by function or path
Move detail into docs/ files; add index entries
Justify each remaining line: does every agent in this directory need it every session?

File Locations

Location	Shared With	Loaded
`AGENTS.md` / `.agents/AGENTS.md`	Team (tracked)	Always
`.agents/rules/*.md`	Team (tracked)	Always
`AGENTS.local.md`	User (untracked)	Always
`~/.agents/AGENTS.md`	User (all projects)	Always
`~/.agents/*`	User (all projects)	Varies by agent

MCP Tool References

Use fully qualified names: ServerName:tool_name (e.g., BigQuery:bigquery_schema). Bare tool names may not resolve when many MCP servers are connected.