feat(v0.4.1): make the Settlement Contract honest end-to-end

Patches each link of the closed-loop chain (world-truth -> invariant ->
dispatch -> worldDelta -> milestone) so the contract can no longer advance
on a lie or stall on an unreachable milestone, and surfaces the result on
the monitor.

- Unblock M6_lighting: add gather.coal producer (mirrors gather.stone,
  strict expectGain), register it, add the skill-graph node, and make
  curriculum.shelter.torch two-step (gather coal -> craft torch). craft.torch
  needed coal but no skill produced it, so the contract pinned on M6 forever
  and starved M7/M8/M9. One curriculum edit fixes both rails.
- M8 no longer falsely satisfied: build-shelter records locations.shelter
  only on real progress (setLocation moved below the no_progress guard).
- M2_bed made monotonic: sleepInBed writes locations.bed when the bot places
  its own bed, so M2 stays met after the carried bed item is consumed.
- Observability: new ink-free tui/format.js helper renders per-tick
  state / firing rail / active skill / blocked prerequisite / stall reason
  in the monitor header (fields bot.js already computes but never showed).
- Harden the valid-skill-id guardrail: skillRegistryPrompt preserves the
  "NEVER invent" footer when truncating (a growing registry was dropping it),
  and fix the stale "tech-tree > autonomous" reflex chain in the escalation
  prompt.

Tests: 494/494 passing; new build-shelter / invariants / format suites plus
skill-graph, curriculum, skill-registry cases. lint-patch clean. Deferred
audit findings recorded in plans/v0.4.0-vnext.md (local).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

runtime/actions.js

@@ -17,6 +17,7 @@ const toolPlugin = toolPkg.plugin ?? toolPkg.default?.plugin ?? toolPkg.default
 import { info, warn } from "./log.js";
 import { digEscapeTunnel } from "./skills/recovery-tunnel-out.js";
 import { findNearestBlockByName } from "./perception.js";
+import { setLocation } from "./locations.js";
 
 // Hard timeout wrapper. Mineflayer goals (pathfinder, pvp targeting) can hang
 // when the goal is unreachable; without a ceiling the whole reflex chain stops.
@@ -364,6 +365,17 @@ export async function sleepInBed(bot) {
 			// have shifted to an adjacent slot for the bed's second half).
 			const placed = findNearestBlockByName(bot, BED_NAMES, { maxDistance: 4 });
 			if (!placed) return { ok: false, detail: "placed bed not found after placement" };
+			// M2 monotonicity: the bot just placed its OWN bed and the carried
+			// item is consumed, so bedSecured()'s carried-item branch no longer
+			// holds. Record the placed bed's location (mirrors choose-base /
+			// place-chest / build-shelter) so the locations.bed branch keeps M2_bed
+			// met and the contract stops looping gather.wool->craft.bed for a bed
+			// that already exists. Recorded before sleep — the bed is in the world
+			// regardless of whether sleeping succeeds; guarded so a store-write
+			// hiccup never breaks the sleep path.
+			try {
+				setLocation("bed", { x: placed.position.x, y: placed.position.y, z: placed.position.z, radius: 1, note: "placed bed" });
+			} catch {}
 			await withTimeout(bot.sleep(placed), 10_000, "bot.sleep(placed)");
 			return { ok: true, detail: { bedAt: placed.position, placed: true, name: carried.name } };
 		} catch (e) {