chore: upgrade agentic support with spec-feature skill, context handoff, and widget tests

[michalurbanek]

New Features

• New /spec-feature skill that chains prd → techspec → tasks in one shot, letting each sub-skill's interactive clarification steps run naturally before automatically proceeding to the next phase.

Improvements

• context.md handoff across the spec pipeline: prd writes a shared context file after saving the PRD; techspec reads it (skipping re-derivation of settled decisions) and appends architectural choices; tasks reads it and appends task count and dependency shape.
• Widget tests added for three example features: landing (ForceUpdatePageContent), authentication (sign-in buttons and loading state), and home (title key and debug tools button) — no real Firebase or network side effects.
• make watch clarified as human-only in AGENTS.md; agents must always use one-shot make gen.

Screenshot

N/A — agentic tooling and test additions only.

[Copilot]

Pull request overview

This PR upgrades the template’s agentic spec workflow by adding a new top-level /spec-feature orchestrator and introducing a shared .claude/tasks/<feature>/context.md handoff across prd → techspec → tasks, while also expanding widget test coverage for the example features.

Changes:

• Added a new spec-feature skill + Claude slash command to run prd → techspec → tasks end-to-end.
• Implemented context.md handoff: prd writes it, techspec and tasks read + append their sections.
• Added Patrol-based widget tests for landing (force update), authentication (sign-in states), and home (title/debug tools).

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
test/features/landing/force_update_page_content_test.dart	Adds widget test coverage for ForceUpdatePageContent UI.
test/features/home/home_page_content_test.dart	Adds widget tests for HomePageContent title and debug tools CTA.
test/features/authentication/authentication_page_content_test.dart	Adds widget tests for AuthenticationPageContent button visibility/loading state.
AGENTS.md	Documents /spec-feature and clarifies make watch is human-only while agents use make gen.
.claude/commands/spec-feature.md	Adds the /spec-feature slash command entrypoint for Claude Code.
.agents/skills/techspec/SKILL.md	Reads shared context.md before clarifications and appends technical decisions after writing techspec.md.
.agents/skills/tasks/SKILL.md	Reads shared context.md and appends task breakdown metadata; recognizes /spec-feature orchestrator mode.
.agents/skills/spec-feature/SKILL.md	Introduces the orchestrator skill chaining prd → techspec → tasks with a consolidated final report.
.agents/skills/prd/SKILL.md	Writes initial .claude/tasks/<feature>/context.md immediately after saving the PRD.

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