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context-mode — MANDATORY routing rules

context-mode MCP tools available. Rules protect context window from flooding. One unrouted command dumps 56 KB into context. context-mode delivers via MCP for OMP; native OMP pre/post tool-call hooks are not yet wired by this adapter, so these rules are the only enforcement path. Treat them as MUST.

Think in Code — MANDATORY

Analyze/count/filter/compare/search/parse/transform data: write code via ctx_execute(language, code), console.log() only the answer. Do NOT read raw data into context. PROGRAM the analysis, not COMPUTE it. Pure JavaScript — Node.js built-ins only (fs, path, child_process). try/catch, handle null/undefined. One script replaces ten tool calls.

BLOCKED — do NOT use

curl / wget — FORBIDDEN

Dumps raw HTTP into context. No hook fallback for OMP today; rule-only enforcement. Use: ctx_fetch_and_index(url, source) or ctx_execute(language: "javascript", code: "const r = await fetch(...)")

Inline HTTP — FORBIDDEN

No node -e "fetch(...", python -c "requests.get(...". Bypasses sandbox. Use: ctx_execute(language, code) — only stdout enters context

Direct web fetching — FORBIDDEN

Raw HTML can exceed 100 KB. Use: ctx_fetch_and_index(url, source) then ctx_search(queries)

REDIRECTED — use sandbox

shell (>20 lines output)

shell ONLY for: git, mkdir, rm, mv, cd, ls, npm install, pip install. Otherwise: ctx_batch_execute(commands, queries) or ctx_execute(language: "shell", code: "...")

read (for analysis)

Reading to edit → read correct. Reading to analyze/explore/summarize → ctx_execute_file(path, language, code).

grep / find (large results)

Use ctx_execute(language: "shell", code: "grep ...") in sandbox.

Tool selection

  1. MEMORY: ctx_search(sort: "timeline") — after resume, check prior context before asking user.
  2. GATHER: ctx_batch_execute(commands, queries) — runs all commands, auto-indexes, returns search. ONE call replaces 30+. Each command: {label: "header", command: "..."}.
  3. FOLLOW-UP: ctx_search(queries: ["q1", "q2", ...]) — all questions as array, ONE call (default relevance mode).
  4. PROCESSING: ctx_execute(language, code) | ctx_execute_file(path, language, code) — sandbox, only stdout enters context.
  5. WEB: ctx_fetch_and_index(url, source) then ctx_search(queries) — raw HTML never enters context.
  6. INDEX: ctx_index(content, source) — store in FTS5 for later search.

Parallel I/O batches

For multi-URL fetches or multi-API calls, always include concurrency: N (1-8):

  • ctx_batch_execute(commands: [3+ network commands], concurrency: 5) — gh, curl, dig, docker inspect, multi-region cloud queries
  • ctx_fetch_and_index(requests: [{url, source}, ...], concurrency: 5) — multi-URL batch fetch

Use concurrency 4-8 for I/O-bound work (network calls, API queries). Keep concurrency 1 for CPU-bound (npm test, build, lint) or commands sharing state (ports, lock files, same-repo writes).

GitHub API rate-limit: cap at 4 for gh calls.

Output

Write artifacts to FILES — never inline. Return: file path + 1-line description. Descriptive source labels for search(source: "label").

Session Continuity

Skills, roles, and decisions persist for the entire session. Do not abandon them as the conversation grows.

Memory

Session history is persistent and searchable. On resume, search BEFORE asking the user:

Need Command
What did we decide? ctx_search(queries: ["decision"], source: "decision", sort: "timeline")
What constraints exist? ctx_search(queries: ["constraint"], source: "constraint")

DO NOT ask "what were we working on?" — SEARCH FIRST. If search returns 0 results, proceed as a fresh session.

ctx commands

Command Action
ctx stats Call stats MCP tool, display full output verbatim
ctx doctor Call doctor MCP tool, run returned shell command, display as checklist
ctx upgrade Call upgrade MCP tool, run returned shell command, display as checklist
ctx purge Call purge MCP tool with confirm: true. Warns before wiping knowledge base.

After /clear or /compact: knowledge base and session stats preserved. Use ctx purge to start fresh.