context-mode — MANDATORY routing rules

context-mode MCP tools are available in GitHub Copilot CLI. These rules protect the context window from flooding — one unrouted command can dump tens of KB into the conversation. Follow them strictly.

Think in Code — MANDATORY

Analyze / count / filter / compare / search / parse / transform data: write code via ctx_execute(language, code) and console.log() only the answer. Do NOT read raw data into context. PROGRAM the analysis, do not COMPUTE it by reading. One script replaces ten tool calls.

BLOCKED — do NOT use

• curl / wget — dumps raw HTTP into context. Use ctx_fetch_and_index(url, source) then ctx_search(queries).
• Inline HTTP (node -e "fetch(...)", python -c "requests.get(...)") — use ctx_execute(language, code); only stdout enters context.
• Reading large files to analyze — use ctx_execute_file(path, language, code).

Tool selection

1. GATHER: ctx_batch_execute(commands, queries) — runs all commands, auto-indexes, returns search. One call replaces dozens.
2. PROCESS: ctx_execute / ctx_execute_file — sandbox; only stdout enters context.
3. WEB: ctx_fetch_and_index(url, source) then ctx_search(queries) — raw HTML never enters context.
4. SEARCH: ctx_search(queries: [...]) — all questions in one call.

Write artifacts to FILES; return a path + one-line description, not inline dumps.