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## Thinking Path > - The runner already persists PRP events, but provider-native activity needs one bounded, provider-neutral vocabulary before additional providers can be added safely. > - The protocol catalog must describe capabilities without enabling or authorizing a provider. > - Provider normalization must not require an ACPX runtime dependency merely to compile the shared event layer. > - This pull request adds the event contract and pure normalizers only; provider transports and production selection remain unchanged. ## Linked Issues or Issue Description This is the first follow-up stacked on #12321. Codex, OpenCode, and ACP runtimes expose different activity shapes. Without canonical normalization, downstream task threads and traces would need provider-specific branching and could retain unbounded or unsafe payloads. ## What Changed - Expand the PRP provider descriptor and canonical activity event families. - Add bounded Codex, OpenCode, and ACP event normalizers for plans, tools, research, delegation, artifacts, review, safety, waits, and notices. - Preserve strict schema validation and regenerate the checked-in schema bundle and manifest. - Use a structural ACP event input so the provider-neutral layer does not introduce or authorize an ACPX runtime dependency. - Export the provider-event contract from the existing package root. ## Verification - `pnpm --filter @paperclipai/paperclip-runner typecheck:typescript` - `pnpm --filter @paperclipai/paperclip-runner test:typescript` — 11 files and 88 tests passed. - `pnpm -r typecheck` - `pnpm build` - `git diff --check` - The local full repository runner reached unrelated macOS workspace-path fixture failures; the affected runner suites pass and the repository CI shards are the handoff authority. - Diff against the declared base: 8 files. ## Compatibility Boundary - No provider transport, adapter, server route, feature flag, or runtime selection changes. - Catalog presence does not authorize discovery or execution. - Existing Codex execution continues through its current path. - No dependency, migration, workflow, or lockfile change. ## Risks The main risk is accepting malformed or unbounded provider payloads. Schema validation remains fail-closed, text/output fields are bounded and redacted, unsafe paths and URLs are discarded, and representative variants for every declared event family are covered by tests. ## Model Used OpenAI Codex, GPT-5 family. The client does not expose the exact deployment ID or context window. Agentic reasoning, tool use, and code execution were enabled. ## Checklist - [x] I have included a thinking path that traces from project context to this change - [x] I have specified the model used (with version and capability details) - [x] I have checked ROADMAP.md and confirmed this PR does not duplicate planned core work - [x] I have searched GitHub for duplicate or related PRs and linked them above - [x] I have described the issue in-PR following the relevant template - [x] I have not referenced internal/instance-local Paperclip issues or links - [x] My branch name describes the change and contains no internal task identifier - [x] I have run the affected local tests and they pass - [x] I have added or updated tests where applicable - [x] I have updated the compatibility notes for this change - [x] I have considered and documented risks above - [x] All Paperclip CI gates are green - [x] Greptile is 5/5 with no open actionable comments - [x] I will address all Greptile and reviewer comments before requesting merge