feat(tools): add ZCode (Z.ai GLM agent harness) (#700)

* feat(tools): add ZCode (Z.ai GLM agent harness)

ZCode reads per-agent markdown from `.zcode/agents/{slug}.md` (project) and
`~/.config/zcode/agents/{slug}.md` (global), with `name` + `description` YAML
frontmatter and an optional `tools` list — the same plain-agent-markdown shape
as Qwen.

- tools.json: add the `zcode` entry (dual-scope, per-agent, format `zcode-md`).
- convert.sh: add `convert_zcode` (byte-identical to the qwen converter,
  output to integrations/zcode/agents/) + register in the dispatch, valid_tools,
  tools_to_run, and parallel_tools.
- install.sh: add `zcode` to ALL_TOOLS, `install_zcode`, `detect_zcode`, and the
  resolve_dest / bin / is_detected / display / label dispatches.

Directories + file format verified against ZCode's published docs. Renderer
contract: `zcode-md` output is byte-identical to `qwen-md`, verified by
diffing `convert.sh --tool zcode` against `--tool qwen` (243/243 files match).

check-tools.sh passes (16 tools consistent across tools.json, install.sh, and
convert.sh); bash -n clean on both scripts.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WdX6PvnCfRgYD11yVpXVor

* zcode: gitignore generated output + add integration README

Bring the ZCode integration in line with the other tools: the 243 generated
agent files (integrations/zcode/agents/*.md) are output of `convert.sh`, not
source — add a .gitignore rule so they can't be committed, and add
integrations/zcode/README.md documenting generate/install (matching the vibe
and qwen integration READMEs).

Verified: generated agents are now git-ignored, the README is tracked, and
check-tools.sh still passes at 16 tools.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WKnDRWM4izsB8WAXKszhsq

* zcode: fix user-scope install path to ~/.zcode/agents (per ZCode docs)

The user-scope dest was ~/.config/zcode/agents/, but the official ZCode docs
state subagents are read from ~/.zcode/agents/<name>.md — so user-scope
installs landed where ZCode never looks. (detect.agentsDir and project scope
were already correct at .zcode/agents, so this was an internal inconsistency.)

Point tools.json dest.user, install_zcode's default, the header comment, and
the list display at ~/.zcode/agents; drop the stale ~/.config/zcode detection
clause; update the integration README. Keep format `zcode-md` distinct — ZCode's
native format supports color/model/permissions, so it will diverge from gemini-md
as the converter matures rather than being a permanent alias.

Verified: a default user-scope install now writes to ~/.zcode/agents/<slug>.md
(not ~/.config/zcode); check-tools.sh passes at 16 tools; install.sh syntax and
tools.json JSON both valid.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WKnDRWM4izsB8WAXKszhsq

---------

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

tools.json

@@ -15,6 +15,7 @@
     "openclaw": {"id":"openclaw","label":"OpenClaw","short":"openclaw","kebab":"openclaw","accent":"#E11D48","icon":null,"order":12,"scope":{"user":true,"project":false},"detect":{"dirs":[".openclaw"],"agentsDir":".openclaw/agency-agents"},"version":{"bin":"openclaw","args":["--version"]},"format":"openclaw-workspace","installKind":"per-agent","slugFrom":"name","dest":{"user":[".openclaw/agency-agents/{slug}/SOUL.md",".openclaw/agency-agents/{slug}/AGENTS.md",".openclaw/agency-agents/{slug}/IDENTITY.md"],"project":[]}},
     "windsurf": {"id":"windsurf","label":"Windsurf","short":"Windsurf","kebab":"windsurf","accent":"#09B6A2","icon":"windsurf","order":13,"scope":{"user":false,"project":true},"detect":{"dirs":[".codeium"],"agentsDir":null},"version":{"bin":"windsurf","args":["--version"]},"format":"windsurf-rules","installKind":"roster","slugFrom":null,"dest":{"user":[],"project":[".windsurfrules"]}},
     "hermes": {"id":"hermes","label":"Hermes","short":"Hermes","kebab":"hermes","accent":"#7C3AED","icon":null,"order":14,"scope":{"user":true,"project":false},"detect":{"dirs":[".hermes"],"agentsDir":".hermes/plugins"},"version":{"bin":"hermes","args":["--version"]},"format":"hermes-router-plugin","installKind":"plugin","slugFrom":null,"dest":{"user":[".hermes/plugins/agency-agents-router"],"project":[]}},
-    "vibe": {"id":"vibe","label":"Mistral Vibe","short":"Vibe","kebab":"vibe","accent":"#FA520F","icon":null,"order":15,"scope":{"user":true,"project":true},"detect":{"dirs":[".vibe"],"agentsDir":".vibe/agents"},"version":{"bin":"vibe","args":["--version"]},"format":"vibe-toml","installKind":"per-agent","slugFrom":"name","dest":{"user":[".vibe/agents/{slug}.toml",".vibe/prompts/{slug}.md"],"project":[".vibe/agents/{slug}.toml",".vibe/prompts/{slug}.md"]}}
+    "vibe": {"id":"vibe","label":"Mistral Vibe","short":"Vibe","kebab":"vibe","accent":"#FA520F","icon":null,"order":15,"scope":{"user":true,"project":true},"detect":{"dirs":[".vibe"],"agentsDir":".vibe/agents"},"version":{"bin":"vibe","args":["--version"]},"format":"vibe-toml","installKind":"per-agent","slugFrom":"name","dest":{"user":[".vibe/agents/{slug}.toml",".vibe/prompts/{slug}.md"],"project":[".vibe/agents/{slug}.toml",".vibe/prompts/{slug}.md"]}},
+    "zcode": {"id":"zcode","label":"ZCode","short":"ZCode","kebab":"zcode","accent":"#4263EB","icon":"zcode","order":16,"scope":{"user":true,"project":true},"detect":{"dirs":[".zcode"],"agentsDir":".zcode/agents"},"version":{"bin":"zcode","args":["--version"]},"format":"zcode-md","installKind":"per-agent","slugFrom":"name","dest":{"user":[".zcode/agents/{slug}.md"],"project":[".zcode/agents/{slug}.md"]}}
   }
 }