Stability checkpoint: OpenCode/GSD stable recovery profiles and Anthropic OAuth fixes

[8syncdev]

Summary

This is a stability checkpoint for the current WezTerm + 8sync repo state.

The current local and pushed state has been validated as a known-good recovery profile for both OpenCode and GSD after the Anthropic / Claude third-party usage breakage discussed in:

• new error: Third-party apps now draw from extra usage... griffinmartin/opencode-claude-auth#145

Included fixes

OpenCode

• restored the working Claude OAuth path
• kept the JS plugin-based workaround path
• reduced Anthropic OAuth system surface in the local auth plugin flow
• made 8sync opencode reinstall purge auth/plugin cache before re-apply
• made 8sync opencode fresh-install inherit the same reinstall fix path
• added --stable usage guidance for the known-good recovery flow

GSD

• patched Anthropic OAuth runtime request construction to keep only the Claude Code identity prefix in the system payload
• normalized the provider UI label from anthropic-api to anthropic
• added 8sync gsd fix
• made 8sync gsd setup auto-apply the runtime fix after setup
• added --stable usage guidance and runtime patch status reporting

Documentation / release hygiene

• added stable-patches/ documentation
• added CHANGELOG.md
• updated README.md with stable recovery commands

Known-good commands

8sync opencode reinstall --stable
8sync opencode fresh-install --stable --claude=yes --openai=yes
8sync gsd fix --stable
8sync gsd setup --model claude+codex --stable

Verification request

Please use this issue as the checkpoint thread for:

• regression checks after future upstream updates
• confirmation that the stable commands still recover the working state
• any follow-up adjustments if OpenCode or GSD upstream changes the Anthropic OAuth path again

[8syncdev]

Post-release fix (2026-04-14T08:44:49Z)

• Fixed Test-CommandExists → Get-Command in Invoke-GsdVersionCheck (was causing version check to fail silently)
• Fixed gsd-pi module resolution: created junction ~/.gsd/agent/node_modules/gsd-pi → global gsd-pi install so extensions can resolve gsd-pi/package.json
• Tag v2026.04.10-stable-1 updated to include this fix
• Version confirmed: gsd-pi 2.69.0 matches pinned
• All 14 projects scanned and cleaned

Verified output

8sync gsd fix --stable
  [ok] gsd-pi version 2.69.0 matches pinned
  [ok] node_modules bridge already valid
  [ok] resource-loader.js shim already valid
  [ok] Anthropic OAuth system prompt fix already applied
  [ok] Anthropic provider label already normalized
  [ok] 14 projects cleaned
  [ok] Unified fix finished