context-document

A guide for creating a structured snapshot of one area of a codebase. The snapshot records what the area does, its important files and patterns, dependencies, and known issues.

In plain words
What is it for?
Use it to document a module, service, or integration; prepare for work spanning several parts of a codebase; or help someone get oriented.
Why use it?
It gives an agent a reliable reference when exploring unfamiliar code or returning to a previously documented area.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/event4u-app/agent-config/context-document
Any agent
npx skills add event4u-app/agent-config --skill context-document
Clone the repo
git clone --depth 1 https://github.com/event4u-app/agent-config

Made for: Claude Code, Codex.

Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,206 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00031 $0.02206
Opus 5 $0.00015 $0.01103
Sonnet 5 $0.00006 $0.00441
Haiku 4.5 $0.00003 $0.00221

Measured 3d ago against content hash e142d245304e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

context-document 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 3d 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.

src/skills/context-document/SKILL.md · 213 lines

How it starts

The opening of the file, as written. The whole thing — 213 lines — stays where its author put it; the contents beside it link to each section on GitHub.

context

When to use

Use this skill when:

  • Documenting a module, service, or integration for future reference
  • Exploring an unfamiliar area of the codebase
  • Preparing for a feature that touches multiple areas
  • Onboarding to a new part of the codebase

Do NOT use when:

  • Writing code or features
  • Creating roadmaps (use roadmap-management skill)

Procedure: Manage contexts

  1. Identify scope — Which area of the codebase needs a context document?
  2. Research — Use codebase-retrieval to understand the area (files, patterns, dependencies).
  3. Write or update — Create/update the context doc following the template below.
  4. Verify — Confirm all referenced files exist and descriptions match current code.

A context document is a structured snapshot of a codebase area:

  • What it does, why it exists
  • Key files, classes, and patterns
  • Database tables and API endpoints
  • Dependencies and known issues

Unlike feature plans (future-focused) or roadmaps (task-focused), contexts are present-focused — they describe the current state of the code.

File structure

.augment/contexts/                       # Shared contexts (about the agent system itself)
├── augment-infrastructure.md
├── skills-and-commands.md
└── documentation-hierarchy.md

agents/settings/contexts/                                # Project-wide contexts
├── {context-name}.md

{module_root}/{Module}/{agent_folder}/settings/contexts/ # Module-scoped contexts
├── {context-name}.md                                    # Laravel: app/Modules/…
                                                         # Symfony: src/Bundle/…
                                                         # Monorepo: packages/…

.augment/templates/
└── contexts.md                          # Context template

Context types

Type Scope Example
Module Single module's structure and purpose client-software.md
Domain Business domain across modules import-pipeline.md
Service Complex service with its dependencies customer-service.md
Integration External API/system integration probaus-api.md
Infrastructure DevOps or infrastructure concern queue-system.md
Knowledge card Trust-tiered cache of expensive (remote) structural evidence — negative facts + pointers durable, positive structure a hypothesis lodash.md, stripe-api.md
Standards card (Class A) Coding standards derived from real tooling config — pointer + digest, trust: high (config-derived), auto-refreshed when the config changes; never a flattened claim coding-standards.md (points at ruff.toml, .editorconfig)
Lesson card (Class C) A learned lesson — symptom (fact) split from hypothesis (decaying theory), trust: low, subject-not-person, anti-calcification decay; promoted only via the human gate (accumulation layer is eval-gated) agents/memory/curated/lessons/<slug>.md
Knowledge page (typed) Team-shared, lifecycle-typed knowledge that grows while working a project — episodic sessions, semantic concepts, procedures on their way to a skill, small decisions agents/knowledge/concepts/api-response-shape.md

Read the full file on GitHub · 213 lines

Changes

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.

  1. 3d ago First seen · 213 lines · 31 tokens per session scan A e142d245304e

Subscribe to this mod's changes

context-document is a skill published in the GitHub repository event4u-app/agent-config (10 stars, last pushed 3d ago), licensed MIT. It adds 31 tokens to every session and 2,206 once invoked, about $0.0002 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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