chore(cleanup): R-b R3 — profiles, phase signals and the effort dialog removed, one fixed path per command

The four profiles, the resolver, the profile validator and docs/profiles.md go;
/trekbrief Phase 3.5 and the brief's phase_signals checks go (an older brief's
key is ignored); MANIFEST_PROFILE_DRIFT and profile_used go. Every Profile,
Composition rule, Sequencing gate and High-effort section leaves the commands.
Decision 209: /trekresearch runs the full swarm with contrarian-researcher as
wave 2 every run; /trekreview and the coordinator run all four passes with no
high-effort normalization. Voyage agents are spawned with no model (their own
model: opus applies); the two built-in spawns pass model "opus". --profile
stays in the parser as a retired flag that swallows its value. §Model & effort
moves to docs/architecture.md; the sequencing-gate eval case goes.

Files removed: 44 (43 from the R3 list + tests/commands/trekreview.test.mjs,
whose every test pinned removed text). Files edited: 43.
Tests: 2467 (2466 pass / 0 fail / 1 skipped) before, 2309 (2309 pass / 0 fail /
0 skipped) after. Durable check: all three groups green, none pending.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

evals/plan-halts-without-intent-approval/scaffold.sh

@@ -1,7 +1,6 @@
 #!/bin/bash
-# Seeds the empty run workspace with a project folder whose brief passes the
-# sequencing gate (brief_version 2.1 WITH phase_signals) but carries no
-# intent_approved_hash, so /trekplan must stop at the intent-approval gate.
+# Seeds the empty run workspace with a project folder whose brief is valid but
+# carries no intent_approved_hash, so /trekplan must stop at the intent-approval gate.
 # Self-contained on purpose: the run cannot read the eval directory.
 set -eu
 mkdir -p proj
@@ -18,15 +17,6 @@ research_status: skipped
 auto_research: false
 interview_turns: 1
 source: fixture
-phase_signals:
-  - phase: research
-    effort: low
-  - phase: plan
-    effort: standard
-  - phase: execute
-    effort: standard
-  - phase: review
-    effort: standard
 ---
 
 # Task: add a greeting helper

evals/plan-halts-without-phase-signals/case.yaml

@@ -1,4 +0,0 @@
-schema_version: "1.1"
-name: plan-halts-without-phase-signals
-context:
-  scaffold_script: scaffold.sh

evals/plan-halts-without-phase-signals/graders/halt-names-signals.md

@@ -1,4 +0,0 @@
----
-type: regex
-pattern: "phase_signals"
----

evals/plan-halts-without-phase-signals/graders/names-code.md

@@ -1,5 +0,0 @@
----
-type: regex
-pattern: 'code\W{1,12}BRIEF_V51_MISSING_SIGNALS'
-target: trace
----

evals/plan-halts-without-phase-signals/graders/no-agent.md

@@ -1,6 +0,0 @@
----
-type: tool_used
-tool: Agent
-min: 0
-max: 0
----

evals/plan-halts-without-phase-signals/graders/no-intent-halt.md

@@ -1,6 +0,0 @@
----
-type: regex
-pattern: 'code\W{1,12}BRIEF_INTENT_'
-target: trace
-match: not_contains
----

evals/plan-halts-without-phase-signals/graders/no-plan-file.md

@@ -1,5 +0,0 @@
----
-type: file_exists
-path: "**/plan.md"
-exists: false
----

evals/plan-halts-without-phase-signals/graders/validator-ran.md

@@ -1,5 +0,0 @@
----
-type: tool_used
-tool: Bash
-input_match: "brief-validator"
----

evals/plan-halts-without-phase-signals/prompt.md

@@ -1,11 +0,0 @@
----
-description: "/trekplan on a brief_version 2.1 brief without phase_signals halts at the sequencing gate."
-expected_outcome: "brief-validator runs, reports BRIEF_V51_MISSING_SIGNALS, and /trekplan halts with the phase_signals hint; no Agent call (no exploration swarm), no plan.md."
-tags: [proevesett, from=proevesett-eval-suite]
-runs: 1
-max_turns: 15
-timeout_seconds: 300
-allowed_tools: [Bash, Read, Glob, Grep, Write, Agent]
----
-
-/voyage:trekplan --project proj

evals/plan-halts-without-phase-signals/scaffold.sh

@@ -1,40 +0,0 @@
-#!/bin/bash
-# Seeds the empty run workspace with a project folder whose brief declares
-# brief_version 2.1 but carries neither phase_signals nor phase_signals_partial.
-# The intent IS approved (a current intent_approved_hash over ## Intent + ## Goal),
-# so the intent gate passes and only the sequencing gate can stop the run.
-# The marker is written literally, not by `intent-approval.mjs --stamp`.
-# Self-contained on purpose: the run cannot read the eval directory.
-set -eu
-mkdir -p proj
-cat > proj/brief.md <<'BRIEF'
----
-type: trekbrief
-brief_version: "2.1"
-created: 2026-09-23
-task: "Eval fixture: add a greeting helper"
-slug: eval-greeting
-project_dir: proj/
-research_topics: 0
-research_status: skipped
-auto_research: false
-interview_turns: 1
-source: fixture
-intent_approved_hash: "sha256:d435093683f06b5832b1a546c5ea54b9b30aebf556bfbf6b05e91a2a85149542"
-intent_approved_at: "2026-09-23T00:00:00.000Z"
----
-
-# Task: add a greeting helper
-
-## Intent
-
-Eval fixture for the Voyage proevesett. Not a real task.
-
-## Goal
-
-A function `greet(name)` returns `Hello, <name>!`.
-
-## Success Criteria
-
-- `greet("Ada")` returns `Hello, Ada!`.
-BRIEF

evals/review-validate-flags-bad-finding-id/scaffold.sh

@@ -17,11 +17,6 @@ research_status: skipped
 auto_research: false
 interview_turns: 1
 source: fixture
-phase_signals:
-  - phase: plan
-    effort: low
-  - phase: review
-    effort: low
 ---
 
 # Task: add a greeting helper

evals/review-validate-passes-clean-review/scaffold.sh

@@ -17,11 +17,6 @@ research_status: skipped
 auto_research: false
 interview_turns: 1
 source: fixture
-phase_signals:
-  - phase: plan
-    effort: low
-  - phase: review
-    effort: low
 ---
 
 # Task: add a greeting helper