Publish the latest feature-iteration handoff and surface it in repo indexes

[Copilot]

This PR runs the incremental-improvements publishing flow against the latest handoff and promotes it into a new published iteration bundle. It also updates the repository’s index surfaces so the current handoff and feature-iteration workflow are discoverable.

• New published iteration

  • Adds state/feature_iterations/iter_149/ with the full 7-file artifact set.
  • Carries forward the latest inbox task from iter_148/06-next-iteration.md into a completed published iteration.
  • Publishes the next handoff in state/feature_iterations/iter_149/06-next-iteration.md.

• Smoke-mode orchestration update

  • Adds a new short alias smoke mode in state/copilot_sdk_smoke_test.py for the newest long-form exact-once adjacency-order guard.
  • Registers the alias in TRACE_SUMMARY_MODE_SPECS.
  • Reuses a shared constant for the long-form mode name across the related newest-long-form guard runners to reduce drift.

• Index updates

  • Adds state/feature_iterations/README.md as the index for the incremental-improvements publishing loop.
  • Updates README.md and docs/index.md to point readers at the published feature-iteration index and current handoff flow.

• Mermaid diagram

  • Adds a focused Mermaid flowchart to state/feature_iterations/README.md showing how the latest 06-next-iteration.md handoff becomes the next published iteration.

Example of the new alias mode:

python state/copilot_sdk_smoke_test.py \
  --mode usage-examples-duplicate-count-wrapper-helper-newest-long-form-adjacency-order-guard-exact-once-adjacency-order-guard-exact-once

Updated docs homepage / publishing index context:

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• unpkg.com
  • Triggering command: /usr/bin/python python -m mkdocs build (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Run the publishing orchestration agent with the last added file to inbox

Make sure to execute all steps, update index files accordingly, add mermaid diagrams when appropriate

---

📱 Kick off Copilot coding agent tasks wherever you are with GitHub Mobile, available on iOS and Android.