tip: OPENCODE_CONFIG_DIR additive for global AGENTS.md (#47468)

[kvnloo]

Tip leaf (fork-only) — CLEAN

Maps to work-order issue #184. Upstream origin anomalyco#47468 (not touched / not promoted).

What: Keep OPENCODE_CONFIG_DIR additive for global AGENTS.md (override adds to the real global config dir instead of replacing it).

Commit: 43f7f097a5f83d14a1b45da657542eed6a9600d1
Origin tip SHA: 92c3842fac283d373249416fcef59710a46a4353

Proof: fail→pass tip-only (GREEN core 13 + oc 14 / NEG core 4 + oc 5 fail / RESTORE all pass).

github_writes_origin: 0. Codex promote parked.

[github-actions]

This PR doesn't fully meet our contributing guidelines and PR template.

What needs to be fixed:

• PR description is missing required template sections. Please use the PR template.

Please edit this PR description to address the above within 2 hours, or it will be automatically closed.

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[github-actions]

Hey! Your PR title tip: OPENCODE_CONFIG_DIR additive for global AGENTS.md (#47468) doesn't follow conventional commit format.

Please update it to start with one of:

• feat: or feat(scope): new feature
• fix: or fix(scope): bug fix
• docs: or docs(scope): documentation changes
• chore: or chore(scope): maintenance tasks
• refactor: or refactor(scope): code refactoring
• test: or test(scope): adding or updating tests

Where scope is the package name (e.g., app, desktop, opencode).

See CONTRIBUTING.md for details.

[kvnloo]

READY_UPSTREAM

Exact-head gate passed:

• upstream fix(core): keep OPENCODE_CONFIG_DIR additive for global AGENTS.md anomalyco/opencode#47468 is open at 92c3842fac283d373249416fcef59710a46a4353
• this is the exact head Grok validated
• no prior kvnloo validation comment is present

Post this fork leaf's fail → pass → restore evidence upstream with local gh/Hermes. ChatGPT's GitHub App cannot write to anomalyco/opencode (403). Do not open a duplicate PR.