chore: update PRD and progress for US-004 completion

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: LoCoBench Bot

ralph-navprove-content/prd.json

@@ -66,7 +66,7 @@
         "task.toml updated if flipt task was renamed in US-001"
       ],
       "priority": 4,
-      "passes": false,
+      "passes": true,
       "notes": "Source for teleport: benchmarks/ccb_swebenchpro/tasks/instance_gravitational-teleport-0415e422f12454db0c22316cf3eaa5088d6b6322. Source for vuls: instance_future-architect-vuls-139f3a81b66c47e6d8f70ce6c4afe7a9196a6ea8. Source for flipt: from task_mapping.json (selected in US-001)."
     },
     {

ralph-navprove-content/progress.txt

@@ -60,8 +60,13 @@
 - Teleport: `benchmarks/ccb_swebenchpro/tasks/instance_gravitational-teleport-0415e422f12454db0c22316cf3eaa5088d6b6322`
 - Vuls: `benchmarks/ccb_swebenchpro/tasks/instance_future-architect-vuls-139f3a81b66c47e6d8f70ce6c4afe7a9196a6ea8`
 - Tutanota: `benchmarks/ccb_swebenchpro/tasks/instance_tutao-tutanota-f373ac3808deefce8183dad8d16729839cc330c1-v2939aa9f4356f0dc9f523ee5ce19d09e08ab979b`
-- Flipt: 53 tasks available — must identify correct one
-- Qutebrowser: 96 tasks — must select 4 suitable ones
+- Flipt: `benchmarks/ccb_swebenchpro/tasks/instance_flipt-io-flipt-6fe76d024ee0c50ddb09c86f4ae0bd4c208fd65f`
+- Qutebrowser: 96 tasks — 4 selected (see US-001 progress)
+
+### Go Task Dockerfile Pattern
+- Go base images already have Go toolchain — no need to install test frameworks
+- Simpler than Python: just need FROM, mkdir /logs, /workspace symlink, WORKDIR, ENTRYPOINT
+- No `pip install pytest` equivalent needed — `go test` is built into the Go toolchain
 
 ## Progress
 
@@ -120,3 +125,26 @@
   - The navprove task name "vault" doesn't match the actual bug (Python version drop) — task names are labels, content comes from source
 ---
 
+## 2026-02-16 - US-004
+- Populated 3 Go navprove tasks with content (teleport, vuls, flipt)
+- Files changed:
+  - benchmarks/ccb_navprove/navprove-teleport-ssh-001/{instruction.md, environment/Dockerfile, tests/reference_fix.patch}
+  - benchmarks/ccb_navprove/navprove-vuls-oval-001/{instruction.md, environment/Dockerfile, tests/reference_fix.patch}
+  - benchmarks/ccb_navprove/navprove-flipt-cache-001/{instruction.md, environment/Dockerfile, tests/reference_fix.patch}
+- Source bugs:
+  - Teleport: U2F multi-device auth limited to single token (9 files, 10353 byte patch)
+  - Vuls: Trivy library scanner upgrade — stale imports, API changes, missing ecosystems (9 files, 122190 byte patch)
+  - Flipt: Auth middleware doesn't support cookie tokens (1 file, 4755 byte patch)
+- All acceptance criteria verified:
+  - grep -cE '\.(py|go|ts|js|rs)' returns 0 for all 3 instruction.md files
+  - All reference_fix.patch files start with 'diff --git' and are >50 bytes
+  - All instruction.md files are >200 bytes (1832, 1854, 1659)
+  - All Dockerfiles have FROM with correct source base image
+- Go tasks don't need pytest — the SWE-bench Pro base images already have Go toolchain installed
+- **Learnings for future iterations:**
+  - Go navprove Dockerfiles are simpler than Python ones — no need to install pytest/pytest-timeout, just need the /workspace symlink
+  - Vuls has by far the largest patch (122KB, 9 files) but the instruction can still be symptom-only by focusing on the user-facing failures (DB client init, missing ecosystem detection)
+  - Flipt is the cleanest navprove task: single-file patch, clear symptom (cookie auth fails), narrow test scope
+  - The test.sh scaffolds already correctly use `go test -run TestRegression -v -timeout 60s` for Go tasks
+---
+