chore: mark US-080 passes: true

Author: NathanFlurry

prd.json

@@ -1357,7 +1357,7 @@
         "Typecheck passes"
       ],
       "priority": 80,
-      "passes": false,
+      "passes": true,
       "notes": "Phase 1 of terminal-e2e-testing.md spec. TerminalHarness is the foundation for all subsequent terminal tests. Adversarial review identified: must define concrete settlement window for type(), detect shell crash in poll loops, and prevent resource leaks on test failure."
     },
     {
@@ -1811,4 +1811,4 @@
       "notes": "CLI E2E Phase 6 \u2014 final phase. Depends on US-080 (TerminalHarness), US-095 (isTTY). Claude Code uses Ink (React-based TUI) with cursor movement, screen clearing, and color codes. Known spawn stall risk."
     }
   ]
-}
+}

progress.txt

@@ -1252,3 +1252,15 @@ PRD: ralph/kernel-hardening (46 stories)
   - fsOpToSyscall maps: write→"write", createDir→"mkdir", rm→"unlink" — match these in expectEacces assertions
   - wrapCommandExecutor passes `cwd: options.cwd` to the childProcess permission checker request
 ---
+
+## 2026-03-17 - US-080
+- Already implemented in prior iteration — TerminalHarness class at packages/kernel/test/terminal-harness.ts (192 lines)
+- @xterm/headless ^6.0.0 already in kernel devDependencies
+- All acceptance criteria verified: constructor (80x24 default), type() with 50ms settlement + in-flight guard, screenshotTrimmed() viewport-only, line(row), waitFor() with 20ms polling + shell death check + descriptive errors, exit() via ^D, dispose() idempotent cleanup
+- Typecheck passes
+- Marked passes: true in prd.json
+- **Learnings for future iterations:**
+  - TerminalHarness is duplicated in packages/runtime/wasmvm/test/ because cross-package test imports aren't supported
+  - WasmVM copy has 5s default timeout vs kernel's 2s — WasmVM shell commands are slower
+  - Shell death detection uses Promise.race with 0ms timeout to non-blockingly check shell.wait()
+---