feat(aircoding): AirCoding V2 baseline — deterministic multi-agent architecture

Forked from OpenCode v1.17.4 with multi-agent system:
- 5 agents: aircoding, scheduler, worker, architect, reviewer
- Deterministic DAG scheduling engine (coordinator_tick)
- Tool whitelists as hard enforcement
- AirCoding validation plugin
- V1 requirements: C4 docs, ADR, AGENTS.md, debug-log.md
- Design documents in docs/

packages/tui/test/prompt/jsonl.test.ts

@@ -0,0 +1,24 @@
+import { expect, test } from "bun:test"
+import { MAX_FRECENCY_ENTRIES, parseFrecency } from "../../src/prompt/frecency"
+import { MAX_STASH_ENTRIES, parsePromptStash } from "../../src/prompt/stash"
+
+test("stash JSONL skips corruption and retains newest entries", () => {
+  const entries = Array.from({ length: MAX_STASH_ENTRIES + 2 }, (_, index) =>
+    JSON.stringify({ input: String(index), parts: [], timestamp: index }),
+  )
+  entries.splice(2, 0, "broken")
+  const result = parsePromptStash(entries.join("\n"))
+  expect(result).toHaveLength(MAX_STASH_ENTRIES)
+  expect(result[0]?.input).toBe("2")
+})
+
+test("frecency JSONL skips corruption, keeps latest path state, and limits entries", () => {
+  const entries = Array.from({ length: MAX_FRECENCY_ENTRIES + 1 }, (_, index) =>
+    JSON.stringify({ path: String(index), frequency: 1, lastOpen: index }),
+  )
+  entries.push("broken", JSON.stringify({ path: "1000", frequency: 2, lastOpen: 2000 }))
+  const result = parseFrecency(entries.join("\n"))
+  expect(result).toHaveLength(MAX_FRECENCY_ENTRIES)
+  expect(result[0]).toEqual({ path: "1000", frequency: 2, lastOpen: 2000 })
+  expect(result.some((entry) => entry.path === "0")).toBe(false)
+})