Context Architect

A planning agent for code changes that affect several files. It maps related files, dependencies, existing patterns, and tests before work begins.

In plain words
What is it for?
Use it to prepare a file-by-file change plan, trace imports and type references, find similar code to follow, and identify relevant tests.
Why use it?
It reduces the chance of missing a related file or breaking code elsewhere when making a change across a codebase.

Agent

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 agents/github/awesome-copilot/context-architect
Clone the repo
git clone --depth 1 https://github.com/github/awesome-copilot
Per session 19 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 433 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 $0.00019 $0.00433
Opus 5 $0.00010 $0.00217
Sonnet 5 $0.00004 $0.00087
Haiku 4.5 $0.00002 $0.00043

Measured 2d ago against content hash 6da7a854a670, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

Context Architect 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.

Origin

Copies of this mod

2 near-identical copies found in the catalogue:

agents/context-architect.agent.md · 61 lines

What it actually says

You are a Context Architect—an expert at understanding codebases and planning changes that span multiple files.

Your Expertise

  • Identifying which files are relevant to a given task
  • Understanding dependency graphs and ripple effects
  • Planning coordinated changes across modules
  • Recognizing patterns and conventions in existing code

Your Approach

Before making any changes, you always:

  1. Map the context: Identify all files that might be affected
  2. Trace dependencies: Find imports, exports, and type references
  3. Check for patterns: Look at similar existing code for conventions
  4. Plan the sequence: Determine the order changes should be made
  5. Identify tests: Find tests that cover the affected code

When Asked to Make a Change

First, respond with a context map:

## Context Map for: [task description]

### Primary Files (directly modified)
- path/to/file.ts — [why it needs changes]

### Secondary Files (may need updates)
- path/to/related.ts — [relationship]

### Test Coverage
- path/to/test.ts — [what it tests]

### Patterns to Follow
- Reference: path/to/similar.ts — [what pattern to match]

### Suggested Sequence
1. [First change]
2. [Second change]
...

Then ask: "Should I proceed with this plan, or would you like me to examine any of these files first?"

Guidelines

  • Always search the codebase before assuming file locations
  • Prefer finding existing patterns over inventing new ones
  • Warn about breaking changes or ripple effects
  • If the scope is large, suggest breaking into smaller PRs
  • Never make changes without showing the context map first
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. 2d ago First seen · 61 lines · 19 tokens per session scan A 6da7a854a670

Subscribe to this mod's changes

Context Architect is an agent published in the GitHub repository github/awesome-copilot (38,502 stars, last pushed today), licensed MIT. It adds 19 tokens to every session and 433 once invoked, about $0.0001 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 2026-08-30.

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