Docs: rewrite README as product landing page

[smota]

Release 1 aligned record

README and website landing now lead with product value and concrete category: GitHub-centered SDLC layer for reviewable AI-assisted delivery.

Current product model

AgentFlow SDLC Release 1 is a GitHub-centered product for reviewable AI-assisted delivery. It includes:

• Canonical SDLC definition, config, paths, gates, and validators.
• Publish-grade npm package and release validation gates.
• Harness-neutral skills plus Claude, AGY, Codex, and Pi adapters.
• Structural settings merge and plugin manifest validation.
• Cockpit as optional first-class Goal Command Center: package/release-gated, runtime opt-in, no unique SDLC state.
• Public multi-page website at C:/Code/movetheneedle/site/agent-sdlc.

Acceptance criteria

• Hero explains pain/value plainly.
• Available-in-v1 capabilities are capability-led, not folder-led.
• Cockpit and harness ecosystem are visible in product journey.

Evidence

• README updated in Make Cockpit first-class optional v1 product #179.
• Website home page created/updated in commit 6569e8f.
• Screenshot: site/agent-sdlc/screenshots/home.png.

Outcome

Completed for Release 1. This issue is closed as part of the current whole-model alignment. Future copy refinements should use new issues, not legacy retrofit compatibility.

[smota]

AgentFlow whole-model alignment

This issue was aligned with the current AgentFlow SDLC product model for screenshot/demo consistency.

• Product area: product:docs, product:sdlc-core
• Release assignment: future / release:future
• Workflow state: Backlog/future candidate; not required for v1 release gate.
• Compatibility rule: GitHub/CLI durable workflow remains authoritative; generated harness surfaces stay adapters only.

No implementation change is implied by this metadata-only alignment comment.

[smota]

Release 1 docs/site alignment complete

Updated this issue to match the implemented Release 1 product strategy and the revamped multi-page AgentFlow SDLC website.

Council incorporated: Claude + AGY product/marketing/IA review.

Website evidence: C:/Code/movetheneedle/site/agent-sdlc, commit 6569e8f, screenshots under screenshots/.

[smota]

Closed after Release 1 product/docs/site alignment and screenshot-ready website revamp.