refactor: rename dev-workflow skill to implementation-orchestrator

The name dev-workflow described a category, not what the skill does. It
orchestrates implementation of already-planned tickets, so the new name
says that. Skill dir, docs page, name field and openai display name are
updated to match; validate-skill.sh moves with the dir and its paths are
fixed for the new depth and engineering/ layout.

docs/engineering/implementation-orchestrator.md

@@ -1,6 +1,6 @@
-# Pi development workflow skill
+# Pi implementation orchestrator skill
 
-`dev-workflow` implements already-planned tracker tickets from issue selection through isolated implementation worktrees, pull/merge requests, review, merge, and cleanup.
+`implementation-orchestrator` implements already-planned tracker tickets from issue selection through isolated implementation worktrees, pull/merge requests, review, merge, and cleanup.
 
 It supports:
 
@@ -40,10 +40,10 @@ Invoke it with an optional ticket ID or URL:
 
 ```text
 # Process only ticket 43
-/skill:dev-workflow 43
+/skill:implementation-orchestrator 43
 
 # Process all available tickets in the current repository
-/skill:dev-workflow
+/skill:implementation-orchestrator
 ```
 
 The ID must be a tracker issue/ticket, not a branch name, PR/MR ID, or session ID. With an ID, only that ticket is processed. With no ID, the skill considers all open tickets in the current repository.

skills/engineering/dev-workflow/scripts/validate-skill.sh

@@ -1,26 +0,0 @@
-#!/usr/bin/env bash
-set -euo pipefail
-
-root="$(cd "$(dirname "${BASH_SOURCE[0]}")/../../.." && pwd)"
-skill="$root/skills/dev-workflow/SKILL.md"
-shared_skill="$root/skills/forge-cli/SKILL.md"
-recipes=(
-	"$root/skills/forge-cli/references/tea.md"
-	"$root/skills/forge-cli/references/gh.md"
-	"$root/skills/forge-cli/references/glab.md"
-)
-
-[[ -f "$skill" && -f "$shared_skill" && -f "${recipes[0]}" && -f "${recipes[1]}" && -f "${recipes[2]}" ]] || {
-	echo 'Missing skill or reference file' >&2
-	exit 1
-}
-head -1 "$skill" | grep -qx -- '---'
-grep -q '^name: dev-workflow$' "$skill"
-grep -q '^description: ' "$skill"
-head -1 "$shared_skill" | grep -qx -- '---'
-grep -q '^name: forge-cli$' "$shared_skill"
-grep -q '^description: ' "$shared_skill"
-node -e 'JSON.parse(require("fs").readFileSync(process.argv[1], "utf8"))' "$root/package.json"
-bash -n "$root/skills/forge-cli/scripts/detect-forge.sh"
-
-printf '%s\n' 'dev-workflow skill is valid'

skills/engineering/implementation-orchestrator/SKILL.md

@@ -1,10 +1,10 @@
 ---
-name: dev-workflow
+name: implementation-orchestrator
 description: Implements ready-for-agent tracker tickets through isolated worktrees, pull requests, review, conflict resolution, and merge. Use after wayfinder and planning have produced tickets, with or without a ticket ID/URL; no ticket ID/URL means process available tickets. Does not create planning tickets.
 disable-model-invocation: true
 ---
 
-# Development workflow
+# Implementation orchestrator
 
 Use this skill only after the human-led wayfinder, plan, spec, and ticket phases. **A tracker ticket ID or URL is optional. Without one, process all eligible open tickets in the current repository.** With an argument, process only that ticket. An ID means the forge's issue/ticket identifier, not a branch, session, or PR ID.
 

skills/engineering/implementation-orchestrator/agents/openai.yaml

@@ -1,5 +1,5 @@
 interface:
-  display_name: "Development Workflow"
+  display_name: "Implementation Orchestrator"
   short_description: "Implements ready-for-agent tracker tickets through isolated worktrees"
 policy:
   allow_implicit_invocation: false

skills/engineering/implementation-orchestrator/scripts/validate-skill.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root="$(cd "$(dirname "${BASH_SOURCE[0]}")/../../../.." && pwd)"
+skill="$root/skills/engineering/implementation-orchestrator/SKILL.md"
+shared_skill="$root/skills/engineering/forge-cli/SKILL.md"
+recipes=(
+	"$root/skills/engineering/forge-cli/references/tea.md"
+	"$root/skills/engineering/forge-cli/references/gh.md"
+	"$root/skills/engineering/forge-cli/references/glab.md"
+)
+
+[[ -f "$skill" && -f "$shared_skill" && -f "${recipes[0]}" && -f "${recipes[1]}" && -f "${recipes[2]}" ]] || {
+	echo 'Missing skill or reference file' >&2
+	exit 1
+}
+head -1 "$skill" | grep -qx -- '---'
+grep -q '^name: implementation-orchestrator$' "$skill"
+grep -q '^description: ' "$skill"
+head -1 "$shared_skill" | grep -qx -- '---'
+grep -q '^name: forge-cli$' "$shared_skill"
+grep -q '^description: ' "$shared_skill"
+node -e 'JSON.parse(require("fs").readFileSync(process.argv[1], "utf8"))' "$root/package.json"
+bash -n "$root/skills/engineering/forge-cli/scripts/detect-forge.sh"
+
+printf '%s\n' 'implementation-orchestrator skill is valid'