docs: add billing bug warning for retired releases v0.25.21–v0.25.39

[lpcox]

Adds a prominent warning banner at the top of the README advising users on retired releases v0.25.21 through v0.25.39 to upgrade due to a billing-impacting bug.

[github-actions]

Documentation Preview

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[github-actions]

🔥 Smoke Test: Copilot BYOK (Offline) Mode

Test	Result
GitHub MCP connectivity	✅ PR #2638 fetched successfully
GitHub.com HTTP connectivity	⚠️ Template vars not expanded (pre-step data unavailable)
File write/read	⚠️ Template vars not expanded (pre-step data unavailable)
BYOK inference (this response)	✅ Agent responding via api-proxy → api.githubcopilot.com

Running in BYOK offline mode (COPILOT_OFFLINE=true) via api-proxy → api.githubcopilot.com.

Author: @lpcox | Reviewers: @Mossaka, @Copilot

Overall: PARTIAL — BYOK inference and MCP confirmed ✅; pre-step data not available due to unexpanded template variables.

🔑 BYOK report filed by Smoke Copilot BYOK

[Copilot]

Pull request overview

Adds a prominent README warning banner to notify users that releases v0.25.21–v0.25.39 were retired due to a billing-impacting bug, and advises upgrading to the latest release.

Changes:

• Added a GitHub-flavored Markdown [!WARNING] admonition at the top of the README.
• Documented the affected version range (v0.25.21 through v0.25.39) and the recommended action (upgrade ASAP).

Show a summary per file

File	Description
README.md	Adds a top-of-file warning banner about retired releases and upgrading due to a billing-impacting bug.

Copilot's findings

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• Files reviewed: 1/1 changed files
• Comments generated: 1

[github-actions]

Smoke Test Results

✅ GitHub MCP (last 2 merged PRs):

• docs: add billing bug warning for retired releases v0.25.21–v0.25.39 #2638 docs: add billing bug warning for retired releases v0.25.21–v0.25.39
• refactor: eliminate duplicate log source resolution logic #2619 refactor: eliminate duplicate log source resolution logic

✅ Playwright (github.com page title): GitHub · Change is constant. GitHub keeps you ahead. · GitHub

✅ File creation & bash verification: smoke-test-claude-25467175900.txt created successfully

Overall: PASS

💥 [THE END] — Illustrated by Smoke Claude

[github-actions]

🔍 Smoke Test Results

Test	Result
GitHub MCP connectivity	✅ PR fetched: "docs: add billing bug warning for retired releases v0.25.21–v0.25.39"
GitHub.com HTTP connectivity	⚠️ Pre-step data unavailable (template vars not expanded)
File write/read	⚠️ Pre-step data unavailable (template vars not expanded)

Overall: PARTIAL — MCP ✅, pre-computed step outputs not available in this run.

Author: @lpcox | Reviewers: @Mossaka, @Copilot

📰 BREAKING: Report filed by Smoke Copilot

[github-actions]

Codex Smoke Test: FAIL

✅ Merged PRs: docs: add billing bug warning for retired releases v0.25.21–v0.25.39 | refactor: eliminate duplicate log source resolution logic
❌ safeinputs-gh query: refactor: split api-proxy server.test.js into focused modules | refactor: extract Copilot API resolver from cli.ts
✅ Playwright GitHub title
❌ Tavily web search unavailable
✅ File write/read
❌ Discussion safe-input unavailable; fallback comment posted to #2633
✅ npm ci && npm run build
Overall status: FAIL

Warning

Firewall blocked 1 domain

The following domain was blocked by the firewall during workflow execution:

• registry.npmjs.org

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "registry.npmjs.org"

See Network Configuration for more information.

🔮 The oracle has spoken through Smoke Codex

[github-actions]

🏗️ Build Test Suite Results

Ecosystem	Project	Build/Install	Tests	Status
Bun	elysia	✅	1/1 passed	✅ PASS
Bun	hono	✅	1/1 passed	✅ PASS
C++	fmt	✅	N/A	✅ PASS
C++	json	✅	N/A	✅ PASS
Deno	oak	N/A	1/1 passed	✅ PASS
Deno	std	N/A	1/1 passed	✅ PASS
.NET	hello-world	✅	N/A	✅ PASS
.NET	json-parse	✅	N/A	✅ PASS
Go	color	✅	passed	✅ PASS
Go	env	✅	passed	✅ PASS
Go	uuid	✅	passed	✅ PASS
Java	gson	✅	1/1 passed	✅ PASS
Java	caffeine	✅	1/1 passed	✅ PASS
Node.js	clsx	✅	passed	✅ PASS
Node.js	execa	✅	passed	✅ PASS
Node.js	p-limit	✅	passed	✅ PASS
Rust	fd	✅	1/1 passed	✅ PASS
Rust	zoxide	✅	1/1 passed	✅ PASS

Overall: 8/8 ecosystems passed — ✅ PASS

Generated by Build Test Suite for issue #2638 · ● 1.4M · ◷

[github-actions]

Smoke Test: GitHub Actions Services Connectivity

Check	Result
Redis PING (host.docker.internal:6379)	❌ timeout / no response
PostgreSQL pg_isready (host.docker.internal:5432)	❌ no response
PostgreSQL SELECT 1	❌ no response

Overall: FAIL — service containers are unreachable via both host.docker.internal and 127.0.0.1. The GitHub Actions service containers may not be running in this environment.

🔌 Service connectivity validated by Smoke Services