feat(#1190): wire --converge primary surface into /gsd:progress --next (ADR-15) (#1237)

* feat(#1190): wire --converge primary surface into /gsd:progress --next (ADR-15)

ADR-15 designates /gsd-progress --next --auto --converge as the PRIMARY plan-convergence surface, but only the secondary surface (autonomous.md) was wired. next.md now parses --converge/--cross-ai into a plan strategy, gates on workflow.plan_review_convergence, forwards reviewer flags + --max-cycles, and routes Route-3 planning through /gsd:plan-review-convergence (mirroring autonomous.md); --auto chaining preserves converge mode. Adds argument-hint + help/full.md + COMMANDS.md + how-to parity and a structural regression test.

Closes #1190

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* chore(#1190): add changeset for progress --converge surface (#1237)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(#1190): keep progress --converge docs skill-dep-clean + regen workflow size baseline

CI surfaced two ripples from the ADR-15 workflow edits: (1) lint-skill-deps + profile-closure flagged /gsd:plan-phase and /gsd:plan-review-convergence SlashCommand tokens in progress.md's flag docs as undeclared deps — reworded to plain prose since progress.md only advertises the flag (the real invocation lives in next.md); (2) the per-file workflow size baseline needed regenerating after the next.md/help edits.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

commands/gsd/progress.md

@@ -1,7 +1,7 @@
 ---
 name: gsd:progress
 description: Check progress, advance workflow, or dispatch freeform intent — the unified GSD situational command
-argument-hint: "[--forensic | --next | --do \"task description\"]"
+argument-hint: "[--forensic | --next [--auto] [--converge] | --do \"task description\"]"
 effort: low
 allowed-tools:
   - Read
@@ -25,6 +25,7 @@ Three modes:
 <flags>
 - **--next**: Detect current project state and automatically invoke the next logical GSD workflow step. Scans all prior phases for incomplete work before routing. `--next --force` bypasses safety gates.
 - **--next --auto**: Like `--next`, but after the determined step completes, automatically re-invokes `/gsd:progress --next --auto` to continue chaining steps until completion or a blocking decision. Enables hands-free plan→execute→verify→complete progression.
+- **--next --converge**: When the next action is planning (Route 3), route it through the plan-review **convergence** loop instead of the standard planner. Requires `workflow.plan_review_convergence=true` (enable with `gsd config-set workflow.plan_review_convergence true`). `--cross-ai` is an alias. Reviewer flags (`--codex`, `--gemini`, `--claude`, `--opencode`, `--ollama`, `--lm-studio`, `--llama-cpp`, `--all`) and `--max-cycles N` are forwarded to the convergence loop.
 - **--do "..."**: Smart dispatcher — match freeform intent to the best GSD command using routing rules, confirm the match, then hand off.
 - **--forensic**: Run 6-check integrity audit after the standard progress report.
 - **(no flag)**: Standard progress check + intelligent routing (Routes A through F).