conductor(spec): drop T-shirt size per user feedback

conductor/tracks/tier2_autonomous_sandbox_20260616/spec.md

@@ -9,11 +9,9 @@
 **Parent tracks:** `opencode_config_overhaul_20260310` (shipped; established the agent profile scaffolding this track extends)
 **Sibling tracks:** none (independent)
 
-> **Note on effort estimates:** per the Tier 1 rules (see
-> `conductor/workflow.md` §"Tier 1 Track Initialization Rules"), this
-> spec does NOT include day estimates. Effort is measured by **scope** (N
-> files, M sites) and **T-shirt size** (S/M/L/XL). The user / Tier 2
-> agent decides the actual pacing.
+> **Note on effort estimates:** this spec measures effort by **scope**
+> only (N files, M sites, N tests). The user / Tier 2 agent decides
+> the actual pacing.
 
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@@ -31,9 +29,9 @@ green-phase failures, or 30 minutes with no commit/green), it stops
 early, writes a failure report, and notifies you. You review the
 feature branch with Tier 1 in the main repo, then merge.
 
-**T-shirt size: L** — 7 new files in main repo (mostly config +
-scripts + 1 small Python module), 4 new test files, 1 PowerShell
-wrapper, 1 bootstrap script, 1 user guide. ~600 lines of new code.
+**Scope:** 7 new files in main repo (mostly config + scripts + 1 small
+Python module), 4 new test files, 1 PowerShell wrapper, 1 bootstrap
+script, 1 user guide. ~600 lines of new code.
 
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