Finishes the steer/transmit loop — advisories now reach the agents' sessions.
- message-sink.js: createEccMessageSink() delivers via the canonical writer
'ecc-tui messages send' (maps steer/hold -> conflict kind, transmit -> query),
resolving the binary from override/env/built target/PATH. Injectable runner;
best-effort (a missing binary/failed send is counted skipped, never blocks).
- proximity.js: createProximityDispatcher() adds per-trigger cooldown so a
persistent collision fires once then stays quiet (agents get steered, not
spammed); runProximityTick() builds the snapshot and dispatches.
- scripts/proximity-tick.js: thin CLI — one-shot, --dry-run, --watch <sec>.
Messages are internal ECC agent-to-agent coordination, not any external channel.
- 14 new tests (sink argv/kind mapping, cooldown dedup, tick dispatch/dry-run,
CLI parse). Full suite 2891/2891; lint green.
- Line precision: parse git diff --unified=0 into per-file changed line ranges
(defaultWorkingSetFor), so two agents in the SAME file but DIFFERENT functions
no longer false-collide. Overlap channel now uses the overlap coefficient
(|A∩B|/min(|A|,|B|)) — high when one edit sits inside the other's region, low
for disjoint ranges; whole-file edit = 1. Docstring + design doc updated.
- Trigger firing: buildProximityTriggers() turns advisories into the concrete
messages — transmit-intent to both on a Traffic Advisory, steer-away to the
yielding agent + a hold notice on a Resolution Advisory. buildProximitySnapshot
now returns triggers; dispatchProximityTriggers(triggers, {sendMessage}) delivers
them through an injectable sink (the ECC messages table), best-effort.
- 12 new tests (line-range disjoint vs overlapping, parseDiffRanges, triggers,
dispatch). Full suite 2881/2881; lint green.
Turns live sessions into the airspace scan: each worktree session's git diff
becomes its working set, the dependency graph is built over the touched files,
and scanAirspace() produces the TCAS advisories + 3D positions.
- scripts/lib/control-pane/proximity.js: sessionsToAgents() + buildProximitySnapshot();
default working-set source shells `git diff --name-only <base>...HEAD` per
worktree (injectable for tests, fails closed to []).
- state.js: opt-in `proximity` field on the snapshot (includeProximity flag) so
the default hot path stays fast (git diffs only run when requested).
- 4 integration tests (same-file editors -> resolution, later agent steers,
<2 participants -> no advisories, labels). Full suite 2873/2873; lint green.
