fix(upgrade): migrate agent.build.prompt to instructions array#66
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fix(upgrade): migrate agent.build.prompt to instructions array#66
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agent.build.prompt/agent.plan.prompt in opencode.json pushes custom
prompts to the top of system[1], displacing the canonical OpenCode
opening. Anthropic's third-party-app detector fingerprints the first
bytes of system[1] on Claude Max OAuth requests; when the canonical
opening is missing, it routes to extra-usage billing and returns 400.
The upgrade script previously skipped Phase 2b (opencode.json drift
check) entirely when the primary runtime was claude-code, even though
opencode.json exists and kimaki spawns opencode sessions. This left
existing installs stuck on the old format with no automated fix path.
Changes:
- repair-opencode-json.py: add prompt migration alongside plugin check
- parse_file_includes() extracts {file:./path} from legacy prompts
- check_prompt_migration() detects agent.build.prompt/plan.prompt
- apply_prompt_migration() removes prompt keys, sets instructions array
- prompt check runs for ALL runtimes; plugin check stays opencode-only
- upgrade.sh: remove runtime gate on check_opencode_json_drift()
- Phase 2b now runs whenever opencode.json exists on disk
- Updated docs/help text for --repair-opencode-json to cover migration
- Summary warns about both plugin and prompt drift
Fixes: wp-coding-agents#60 (automated migration for existing installs)
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Problem
Existing installs set up before #60 have
agent.build.prompt/agent.plan.promptin theiropencode.json. This format pushes custom prompts to the top ofsystem[1], displacing OpenCode's canonical opening. Anthropic's third-party-app detector fingerprints the first bytes ofsystem[1]on Claude Max OAuth requests — when the canonical opening is missing, it routes to extra-usage billing and returns 400.The upgrade script's Phase 2b skipped the drift check entirely when the primary runtime was
claude-code, so installs where kimaki spawns opencode sessions (like chubes.net) were stuck with no automated fix path.Changes
lib/repair-opencode-json.py— added prompt migration alongside existing plugin check:parse_file_includes()— extracts{file:./path}references from legacy prompt stringscheck_prompt_migration()— detectsagent.build.prompt/agent.plan.promptpresenceapply_prompt_migration()— removespromptkeys, sets top-levelinstructionsarrayupgrade.sh— Phase 2b now runs wheneveropencode.jsonexists:RUNTIME != "opencode"gate oncheck_opencode_json_drift()--repair-opencode-jsonnow fixes both plugin array and prompt formatTesting
Verified on chubes.net VPS (runtime: claude-code, bridge: kimaki):
opencode.json→ diagnostic detectsprompt_migration: "needed"--apply→ migrates correctly, preserves mode/model/plugin/permissionsok(idempotent)upgrade.sh --dry-runwith old config → warns about driftupgrade.sh --dry-runwith new config → reports "matches current setup"