fix: replace stale unprefixed slash command refs with uf.* namespace

[yvonnedevlinrh]

What & Why

After the uf.* slash-command namespace migration (unbound-force#304), numerous docs, agent prompts, and command files still referenced the old unprefixed command names. Agents following these instructions literally would invoke commands that no longer resolve — most critically the Review Council PR gate in AGENTS.md and the highest-authority constitution, creating a fail-open risk where a governance gate could be silently skipped.

This PR is the comprehensive sweep tracked by #84 and also resolves the AGENTS.md-scoped subset #93.

Changes

All live references to renamed commands updated to the uf.* namespace:

Old	New
/review-council	/uf.review-council
/review-pr	/uf.review-pr
/address-feedback	/uf.address-feedback
/finale	/uf.finale
/unleash	/uf.unleash
/cobalt-crush	/uf.cobalt-crush

Files touched (17):

• AGENTS.md — Review Council PR-prerequisite section (L158, L169)
• .specify/memory/constitution.md — Code Review governance rule (L94)
• .opencode/agents/cobalt-crush-dev.md — review-findings step
• .opencode/skills/review-context/SKILL.md — command dispatch table
• .opencode/commands/uf.review-council.md — self-references
• .opencode/commands/uf.finale.md — self-references
• .opencode/commands/opsx-propose.md — guardrail command names
• .opencode/commands/uf.init.md — scaffold next-step guidance
• 8 × .opencode/commands/speckit.*.md — shared next-step guidance line

Intentionally NOT changed

• CHANGELOG.md — documents the rename as historical record
• openspec/changes/harden-handoff-dcp/* — archived prose describing past behavior in another repo, not live command dispatch
• /speckit.implement and /opsx-apply — not part of the renamed set

Verification

Substring-safe grep (negative-lookbehind, excluding history/archive) returns zero remaining stale references to renamed commands:

grep -rniP --include='*.md' "(?<!uf\.)(?<!\w)/(review-council|review-pr|address-feedback|finale|unleash|cobalt-crush)\b" . \
  | grep -vE '(CHANGELOG\.md|/openspec/|\.opencode/command/)'
# (no output)

Documentation/agent-prompt-only change — exempt from spec workflow and review council per AGENTS.md and the constitution. No Go source, tests, or CI config affected.

Resolves #93
Closes #84

[em-redhat]

APPROVE — Clean, complete documentation fix. All 17 files correctly update stale unprefixed slash-command references to the uf.* namespace. Both linked issues (#93, #84) fully satisfied. Zero remaining stale references confirmed by git grep against PR HEAD. No governance gates weakened.

This review was generated by /uf.review-pr (AI-assisted).