daily-fix: pin mbc inline Alt capsule to lens reference

Overview / Motivation

Auto-filed by the /daily 2026-07-13 parked-candidate routing pass (Step C) from a candidate parked on task #1292 (emitting agent: Alternatives critic, Phase 2 round 1, recursion-guard park at 2026-07-13T08:31:04Z).

Goal

Couple the inline Alternative-Explanations capsule in methodology-baselines-critic.md to its source text in critic-lens-reference.md (a needle/test pin, or convert the capsule to a heading-grep load instruction covered by the #1292 anchor pins).

Workflow gap

• Bug observed: methodology-baselines-critic.md reviews Alternative-Explanations items 1-3 from an INLINE capsule copy (item 2, ~L124-139: "This item absorbs the Alternative Explanations lens's fatal-confound screen (v1 Alt items 1-3)") with no heading grep, so that capsule can drift from critic-lens-reference.md § Alternative Explanations lens silently — the same drift class #1292 closed for the heading-grep-loaded lens spans.
• Why it is a workflow gap: #1292 pinned the grep-loaded rubric spans against anchor loss, but the one remaining inline capsule has no equivalent coupling; a rename/edit at the source leaves the capsule stale with no signal.
• Confidence (emitter): medium
• verified-at-filing: grep -n -i "alternative" .claude/agents/methodology-baselines-critic.md → 5 hits; the inline capsule sits at L124-139 (item 2) with no needle/test coupling to critic-lens-reference.md (2026-07-14 UTC)

Proposed change (candidate diff sketch — refine in planning)

Add a source-pin test (grep needle shared between the capsule and critic-lens-reference.md § Alternative Explanations lens, asserted by a workflow-invariant test) OR replace the capsule with a heading-grep load instruction of the reference span, matching the #1292 Canonical-heading-anchor pattern.

Scope / surfaces

• Primary target: .claude/agents/methodology-baselines-critic.md
• Secondary: .claude/rules/critic-lens-reference.md (needle placement), tests/ (the pin test)

Constraints / invariants

• Workflow-surface only. scripts/workflow_lint.py default run passes.
• This session runs under a workflow_fix_target: Provenance line — recursion guard applies.

Provenance

• workflow_fix_target: .claude/agents/methodology-baselines-critic.md
• fingerprint: d4a8c93635ee

Verbatim parked candidate (prose-followup synthesized, parked on #1292 events.jsonl at 2026-07-13T08:31:04Z):

target_file: .claude/agents/methodology-baselines-critic.md bug_observed: the agent reviews Alternative-Explanations items 1-3 from an INLINE capsule copy (L116-117) with no heading grep, so that capsule can drift from critic-lens-reference.md § Alternative Explanations lens silently — the same drift class #1292 closes elsewhere. proposed_change: add a needle/test coupling the inline Alt capsule to the reference text (or convert the capsule to a heading-grep load instruction covered by the #1292 pins). confidence: medium related_task: #1292