Where it lives and who reads it
File: .agentic/tracking.md at the project root (legacy path .claude/tracking.md also recognized as fallback).
Reader: the orchestration-planner agent, during step 7 of its planning process:
Check for .agentic/tracking.md first, then .claude/tracking.md (legacy fallback).
If it exists at either path, read it and follow its instructions.
The planner is otherwise strictly read-only. tracking.md is the one file that can instruct it to run commands (curl a ticket API, update a status, post a comment).
Two newer mechanisms complete the tracker picture. .agentic/tracker.yml (via bin/ds-tracker) is a local overlay for resolving TRACKER - sole source when AGENTS.md declares no tracker, field-merged when it declares the same one; it refuses to write any path git tracks. The Tracker Writeback Helper (content/references/tracker-writeback.md) is the reusable subagent pattern behind every state transition - gated on TRACKER != none, forward-only so a ticket never moves backward.
No file = no tracker actions. The protocol degrades cleanly for projects that don't care.