feat(packaging): add Antigravity plugin artifact

Co-authored-by: Codex (GPT 5.6 Sol) codex@openai.com

Author: july

docs/adapters/contributing-new-coding-agent.md

@@ -232,7 +232,7 @@ been verified. Use a host-specific adapter page only when the matrix's split
 triggers are met.
 
 Before commit or review, use the
-[Change Traceability Review](../../.agents/skills/change-traceability-review/SKILL.md)
+[Change Traceability Review](https://github.com/QoderAI/better-harness/blob/main/.agents/skills/change-traceability-review/SKILL.md)
 in Review Readiness Check mode. The pull request should state:
 
 - the host/version and primary contract evidence;
@@ -242,7 +242,7 @@ in Review Readiness Check mode. The pull request should state:
 - privacy, compatibility, generated-file, rollback, and residual risks;
 - AI involvement and the human verification performed.
 
-Use the repository [pull request template](../../.github/pull_request_template.md).
+Use the repository [pull request template](https://github.com/QoderAI/better-harness/blob/main/.github/pull_request_template.md).
 Do not infer Story ids, AI involvement, CI status, or native compatibility from
 branch names, prose, passing synthetic tests, or similarity to another host.
 

docs/specs/2026-08-19-67-antigravity-plugin-artifact.md

@@ -137,7 +137,7 @@ when concurrent threads could edit the same files.
 
 Use subagents for bounded exploration, testing, triage, or independent review
 while the main thread owns the final decision and implementation.
-Use [Custom Agent Review](custom-agents-review.md) when configured Agent
+Use [Custom Agent Review](../custom-agents-review.md) when configured Agent
 profiles, their descriptions, prompts, tool boundaries, or inventory count need
 quality review.
 

references/agent-customize/platforms/codex.md

@@ -206,7 +206,7 @@ Official scenario examples:
 
 > Official documentation: https://docs.qoder.com/extensions/subagent
 
-Use [Custom Agent Review](custom-agents-review.md) for provider-neutral content
+Use [Custom Agent Review](../custom-agents-review.md) for provider-neutral content
 quality, tool-boundary, count, and report-summary checks. This section owns the
 Qoder file format and invocation examples only.
 

references/agent-customize/platforms/qoder.md

@@ -93,7 +93,7 @@ entry/exit logs across every function.
 
 ## What Belongs in AGENTS.md
 
-Load [agents-md-review.md](agents-md-review.md) when instructions are in scope.
+Load [agents-md-review.md](../agent-customize/agents-md-review.md) when instructions are in scope.
 Keep only non-inferable facts:
 
 - actual logging facade and architecture link;