diff --git a/.dockerignore b/.dockerignore
index 1b9aa11ca5..d3c65ab51d 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -37,3 +37,11 @@ packages/paperclip-runner/scripts/*-smoke.mjs
 # now guards this in PR CI.
 !packages/paperclip-runner/generated/**
 !packages/paperclip-runner/docs/capability-contract.md
+!packages/paperclip-runner/src/backends/harness-driver-backend.test.ts
+!packages/paperclip-runner/src/contracts/native-execution.test.ts
+!packages/paperclip-runner/src/drivers/acpx/codex-acpx-driver.test.ts
+!packages/paperclip-runner/src/drivers/acpx/runtime-host.test.ts
+!packages/paperclip-runner/src/drivers/opencode/mcp-bridge.test.ts
+!packages/paperclip-runner/src/drivers/opencode/opencode-server-driver.test.ts
+!packages/paperclip-runner/src/native-session-runtime.test.ts
+!packages/paperclip-runner/src/protocol/result-normalization.test.ts
diff --git a/.github/docker-context-checks.Dockerfile b/.github/docker-context-checks.Dockerfile
index 48f5921d9c..cf239482a4 100644
--- a/.github/docker-context-checks.Dockerfile
+++ b/.github/docker-context-checks.Dockerfile
@@ -30,7 +30,8 @@ COPY . .
 RUN test -f packages/paperclip-runner/generated/capability/semantic-tool-contracts.json \
  && test -f packages/paperclip-runner/generated/semantic-action-catalog.json \
  && test -f packages/paperclip-runner/spec/evals/stress-workflow-traceability.json \
- && test -d packages/paperclip-runner/protocol/fixtures/replay
+ && test -d packages/paperclip-runner/protocol/fixtures/replay \
+ && node -e "const fs=require('node:fs');const path=require('node:path');const root='packages/paperclip-runner';const manifest=JSON.parse(fs.readFileSync(path.join(root,'spec/evals/stress-workflow-traceability.json'),'utf8'));for(const finding of manifest.findings){for(const regressionTest of finding.regressionTests){fs.accessSync(path.resolve(root,regressionTest));}}"
 # ajv is installed in an isolated directory (the runner's own package.json
 # uses workspace: ranges npm cannot install from) and symlinked in so ESM
 # resolution finds it from the scripts' location.