Context Manager

Keeps sessions lean. Tracks query count, warns before context bloats, saves a handoff summary so work continues cleanly in the next session.

How It Works

1. Counter — Increment session_query_count.txt every turn
2. Warn — At threshold, write handoff.md and alert the user
3. Reset — User runs /new; next session reads and deletes handoff.md

Files

Every Turn (mandatory)

1. Read session_query_count.txt (default 0 if missing)
2. Increment by 1
3. Write back
4. If count == THRESHOLD: trigger handoff flow

Default threshold: 10. Configurable per deployment.

Handoff Flow (at threshold)

1. Write handoff.md — see handoff-format.md for exact spec
2. Tell the user:

   ⚠️ 10 queries in — context is getting heavy. Handoff saved. Run /new when ready to continue.

3. Do NOT auto-reset. User controls the reset.

Session Start Flow

1. Check if handoff.md exists
2. If exists AND file is \x3C 3 hours old:
   a. Read it
   b. Apply context to current session
   c. Delete handoff.md
3. Reset session_query_count.txt to 0

Topic Switch Detection

When the user says "BTW", "switching gears", "new topic", or starts a clearly unrelated task:

1. Write/overwrite handoff.md immediately (don't wait for threshold)
2. Tell the user: "Handoff saved — /new when ready"
3. Resume or continue current task

Why This Matters

Session context is cumulative. Every prior message, tool call, and assistant response is re-sent on every new query. Without resets, a lean 18K-token session becomes 50K–400K+ within hours.

See token-math.md for cost impact data and reset savings estimates.

Commands

Configuration

Override defaults in AGENTS.md or equivalent workspace config:

- CONTEXT_THRESHOLD: 10        # Queries before warning (default: 10)
- HANDOFF_TTL_HOURS: 3         # Hours before handoff.md is considered stale (default: 3)

Reliability Rules

• Never skip the counter increment — even for one-liner responses
• Never auto-reset — the user owns the session lifecycle
• Handoff must be written before warning — never warn without saving state first
• Counter file is source of truth — do not track in memory

What This Saves You

See token-math.md for the full cost breakdown.

Built by CertainLogic — trusted fact infrastructure for AI agents.