docs: retire Echo-only convergence project

[flyingrobots]

Summary

• replace stale Echo-only Project merge-train(geom-1): rmg-geom foundation + broad-phase AABB tree #14 references with the cross-repository Continuum Stack Convergence Project devcontainer: VS Code container with Rust stable+MSRV, Node 20, gh CLI #15
• update the WAL/WSC doctrine guard and regression fixture to require Project devcontainer: VS Code container with Rust stable+MSRV, Node 20, gh CLI #15
• align the GitHub-native sequencing doc with the configured Project devcontainer: VS Code container with Rust stable+MSRV, Node 20, gh CLI #15 field model
• add PR docs: define the Echo 1.0 release contract and move live planning to GitHub #582 to Project devcontainer: VS Code container with Rust stable+MSRV, Node 20, gh CLI #15 as a completed GP0 release-control proof item

Validation

• scripts/check-wal-wsc-doctrine.sh
• scripts/tests/check_wal_wsc_doctrine_test.sh
• pnpm exec prettier --check CHANGELOG.md docs/BEARING.md docs/WorkItems.md docs/releases/echo-1.0-contract.md docs/design/wal-wsc-durability-roadmap.md docs/design/work-item-sequencing-and-prioritization.md
• pnpm exec markdownlint-cli2 CHANGELOG.md docs/BEARING.md docs/WorkItems.md docs/releases/echo-1.0-contract.md docs/design/wal-wsc-durability-roadmap.md docs/design/work-item-sequencing-and-prioritization.md
• shellcheck scripts/check-wal-wsc-doctrine.sh scripts/tests/check_wal_wsc_doctrine_test.sh
• bash -n scripts/check-wal-wsc-doctrine.sh scripts/tests/check_wal_wsc_doctrine_test.sh
• scripts/check_spdx.sh CHANGELOG.md docs/BEARING.md docs/WorkItems.md docs/releases/echo-1.0-contract.md docs/design/wal-wsc-durability-roadmap.md docs/design/work-item-sequencing-and-prioritization.md scripts/check-wal-wsc-doctrine.sh scripts/tests/check_wal_wsc_doctrine_test.sh
• cargo check
• git diff --check
• pre-commit hook
• pre-push hook

Summary by CodeRabbit

• Documentation

  • Updated project planning and tracking references across documentation to point to the Continuum Stack Convergence Project.
  • Updated work tracking links and planning documentation.

• Chores

  • Updated project validation scripts to reflect new tracking references.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 6ea04ae and e9ccb37.

📒 Files selected for processing (8)

• CHANGELOG.md
• docs/BEARING.md
• docs/WorkItems.md
• docs/design/wal-wsc-durability-roadmap.md
• docs/design/work-item-sequencing-and-prioritization.md
• docs/releases/echo-1.0-contract.md
• scripts/check-wal-wsc-doctrine.sh
• scripts/tests/check_wal_wsc_doctrine_test.sh

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📝 Walkthrough

Walkthrough

All references to the "Echo 1.0 Convergence Project" (GitHub Projects #14) are replaced with the "Continuum Stack Convergence Project" (GitHub Projects #15) across six documentation files, the check-wal-wsc-doctrine.sh validation script, and its test. The work-item sequencing doc also updates the permitted Track field values.

Changes

Project Reference Migration to Continuum Stack Convergence Project

Layer / File(s)	Summary
Doc updates: project name and URL CHANGELOG.md, docs/BEARING.md, docs/WorkItems.md, docs/design/wal-wsc-durability-roadmap.md, docs/design/work-item-sequencing-and-prioritization.md, docs/releases/echo-1.0-contract.md	Project name changed from "Echo 1.0 Convergence Project" to "Continuum Stack Convergence Project" and GitHub Projects link updated from projects/14 to projects/15 in all six files. The sequencing doc additionally expands the allowed Track field values (adds "Echo", "Graft", "WARP TTD", "WARP DRIVE", "Wesley"; removes "Durability"). The gh project item-list command in WorkItems.md is updated to query project 15.
Doctrine checker and test: updated assertions scripts/check-wal-wsc-doctrine.sh, scripts/tests/check_wal_wsc_doctrine_test.sh	project_url updated to projects/15; all require_literal checks for BEARING, WorkItems, sequencing doctrine, release contract, and WAL durability doctrine updated to validate Continuum Stack Convergence Project links. Test fixture targets projects/15 and expected output updated to name "Continuum Stack Convergence Project".

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Possibly related PRs

• flyingrobots/echo#582: Introduced scripts/check-wal-wsc-doctrine.sh and its tests to validate Echo 1.0 release contract and doctrine doc project links — directly the same script this PR updates from projects/14 to projects/15.

Suggested labels

release:echo-1.0

Poem

From project fourteen to fifteen we go,
Continuum Stack gets the starring show.
The checker now validates the right link,
Track values expanded before you can blink.
One rename, all docs snap into sync. 🔗

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'docs: retire Echo-only convergence project' accurately summarizes the main change: replacing references to the Echo-only Project #14 with the Continuum Stack Convergence Project #15 across multiple documentation and validation script files.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/retire-echo-project-14

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