Fixes #1476

问题

Kimi Code CLI builds newer than what #1456 covered dropped the --work-dir
flag. Passing it now produces:

error: unknown option --work-dir

The reporter (#1476, v1.4.1, Kimi Code agent) hits this on every spawn
because session.go:97-99 always appended the flag whenever a non-default
workDir was set. The #1461 / #1456 fix gated --print the same way; this
PR closes the gap for --work-dir.

改动

Follows the exact same probe-based pattern as #1456 / PR #1461 (referenced
for both users and reviewers who already validated that approach).

agent/kimi/probe.go

• kimiFlagSupport gains WorkDir bool.
• probeKimiFlags populates it from the existing parseKimiHelpFlags map:

  support := kimiFlagSupport{
      Print:   flags["--print"],
      WorkDir: flags["--work-dir"],
  }

• Doc comment extended to reference both [Bug] ❌ 错误: error: unknown option '--print' (Did you mean --prompt?) #1456 and [Bug] ❌ 错误: error: unknown option '--work-dir' #1476.

agent/kimi/session.go

• One-line gate:

  if ks.workDir != "" && ks.flagSupport.WorkDir {
      args = append(args, "--work-dir", ks.workDir)
  }

• The agent still runs in the correct directory because exec.Command.Dir
  is set on the spawned *exec.Cmd (downstream of this line) — same as in
  the fix(kimi): conditionally pass --print so newer Kimi Code CLI works (#1456) #1461 fix.

agent/kimi/probe_test.go

• TestParseKimiHelpFlags_LegacyAdvertisesPrint now also asserts
  flags["--work-dir"] is true (legacy CLI supports it).
• New constant modernKimiHelpWithoutWorkDir mirrors the Kimi Code CLI
  build the reporter hits (no --print, no --work-dir).
• New TestParseKimiHelpFlags_ModernWithoutWorkDir asserts neither flag
  is detected on the deeper-no-work-dir surface.
• Existing TestParseKimiHelpFlags_ModernHidesPrint left intact (it
  covers the in-between surface where --print is gone but --work-dir
  still exists — useful regression coverage).
• New TestKimiFlagSupport_LegacyHelpSetsWorkDir +
  TestKimiFlagSupport_ModernWithoutWorkDir exercise the full probe-
  mapping, not just parseKimiHelpFlags, since that's what
  buildArgs actually consumes.

agent/kimi/session_test.go

• TestBuildArgs_WorkDirFlagGated — workDir=/, flagSupport{WorkDir:false}
  → --work-dir MUST NOT appear, AND the value / MUST NOT leak into args
  (catches a partial-gate bug where only the flag name is dropped).
• TestBuildArgs_WorkDirFlagEmitted — workDir=/, flagSupport{WorkDir:true}
  → --work-dir / MUST appear (legacy CLI keeps non-default dir support).

触发条件 / trade-off

• Why reuse parseKimiHelpFlags instead of adding a new parser?
  --work-dir already appears in the help-text of both legacy and the
  in-between build the existing modernKimiHelp constant models. The
  existing parser picks it up the same way it picked up --print — no
  new parser logic, no new layout assumptions.
• Why a separate modernKimiHelpWithoutWorkDir instead of editing
  modernKimiHelp? The modernKimiHelp constant is anchored in the
  [Bug] ❌ 错误: error: unknown option '--print' (Did you mean --prompt?) #1456 fix history; editing it would silently invalidate that test's
  assertion contract. Two-realistic-surfaces is the cleaner modeling.
• Risk for users on default dirs? None — cmd.Dir is set
  unconditionally, so whether the CLI sees --work-dir $X or just takes
  cwd from cmd.Dir, the agent runs in the same directory. The only
  practical difference is users on non-default dirs whose modern CLI
  previously crashed: they now get clean startup (cwd fallback).
• Risk for users with legacy kimi-cli? None — they advertise
  --work-dir in help, the probe sees it, buildArgs still emits it.

验证

• gofmt -l agent/kimi/ — clean
• go vet ./agent/kimi/... — clean
• go test -count=1 ./agent/kimi/... — all pass (4 prior + 6 new =
  10 tests in the probe/session suites)

不做什么

• 不改 Kimi Code CLI 本身
• 不改其他 agent adapter (Claude / Codex / Gemini / Cursor / OpenCode
  etc. each have their own flag handling; out of scope)
• 不改 probe 探测逻辑本身 (沿用现有 kimi --help 解析 + 短超时
  fallback to modern surface on probe failure)
• 不重构 buildArgs / kimiFlagSupport — 仅加一个 bool 字段

关联

• 同 template 参考: PR fix(kimi): conditionally pass --print so newer Kimi Code CLI works (#1456) #1461 (--print gating, [Bug] ❌ 错误: error: unknown option '--print' (Did you mean --prompt?) #1456)
• 同 reporter: issue [Feature] QQ OneBot: add group_reply_all option (parity with Feishu, Discord, Telegram) #1475 (group_reply_all for QQ platform) 是独立
  PR，本次不合并。

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