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Closes the "hooks only fire on Claude" gap. Phase C extends KeiSeiKit safety
enforcement (no-github-push, safety-guard, destructive-guard, citation-verify,
numeric-claims-guard) to any MCP-capable LLM CLI through a 3-tier honesty model.
## 3-tier model
TIER 1 (full native): claude (existing), grok (port hooks to grok settings.json)
TIER 2 (MCP-wrapped): copilot (--excluded-tools=shell + force kei_bash via MCP)
TIER 3 (advisory): agy + kimi (cannot disable native shell; prompt-level only)
## Design (Constructor Pattern)
1. hooks/_lib/policy-chain.toml — SSoT: which hooks gate which tool (bash/edit/write)
2. _primitives/_rust/kei-mcp/src/handlers/safe_tools.rs — new module, 3 built-in
MCP tools that synthesize Claude PreToolUse JSON, run hook chain, abort on
exit-2, exec on all-pass. Same input contract → hooks reused as-is, no rewrite.
3. tools.rs short-circuit: kei_bash/kei_edit/kei_write dispatched before atom layer
4. 6 wire scripts: orchestrator + one per CLI (Constructor Pattern, no mixin)
5. bin/kei mcp-wire arm
6. docs/encyclopedia/cross-cli-policy.md — honest 3-tier matrix + verification
## Double-enforcement guard
If kei-mcp invoked from a process with $CLAUDECODE=1 or $GROKCODE=1, the chain
SKIPS — native hooks already fired. Wire scripts set these env vars in the
MCP server registration for claude/grok respectively. On copilot/agy/kimi the
env is unset → chain runs.
## Smoke (verified live)
Block: kei_bash{command: forbidden-push-pattern}
→ JSON-RPC error -32603 with full "BLOCK — RULE 0.1 NO GITHUB PUSH" stderr ✓
Pass: kei_bash{command: "echo HELLO-FROM-KEI-BASH"}
→ result.content[0].text = "HELLO-FROM-KEI-BASH" ✓
tools/list: 4 built-ins present (spawn_agent + kei_bash + kei_edit + kei_write) ✓
## Tests
kei-mcp: 3/3 (tools_list assertions updated for atoms+4 built-ins).
Build clean with toml = "0.8" dep added.
## Out of scope (deferred)
- Codex CLI wiring (not installed locally)
- ACP middleware proxy (transport, not middleware — ruled out at research)
- Container/firejail sandboxing for agy/kimi (heavy; documented limit instead)
- Native Rust PatternGate migration (optimization, separate phase)
52 lines
1.6 KiB
Bash
Executable file
52 lines
1.6 KiB
Bash
Executable file
#!/usr/bin/env bash
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# kei-mcp-wire-copilot — TIER 2: MCP-wrapped enforcement for GitHub Copilot.
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#
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# Copilot CLI has NO hook system, BUT:
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# 1. Supports --excluded-tools='shell' to disable native shell.
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# 2. Has MCP server config at ~/.copilot/mcp-config.json.
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# So: register kei-mcp via MCP, and instruct user to launch Copilot with
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# --excluded-tools=shell so the agent can't use native bash and must use
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# our policy-gated kei_bash.
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set -eu
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CFG="$HOME/.copilot/mcp-config.json"
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KEI_MCP_BIN="$HOME/.claude/_primitives/_rust/target/release/kei-mcp"
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[ -f "$KEI_MCP_BIN" ] || KEI_MCP_BIN="$(command -v kei-mcp 2>/dev/null || true)"
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if [ -z "$KEI_MCP_BIN" ] || [ ! -x "$KEI_MCP_BIN" ]; then
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echo " copilot: kei-mcp binary missing — build first: cargo build -p kei-mcp --release"
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exit 0
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fi
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mkdir -p "$(dirname "$CFG")"
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[ -f "$CFG" ] || echo '{}' > "$CFG"
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desired=$(cat <<JSON
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{
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"mcpServers": {
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"kei-mcp": {
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"type": "stdio",
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"command": "$KEI_MCP_BIN"
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}
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}
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}
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JSON
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)
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if [ "${KEI_WIRE_DRY_RUN:-0}" = "1" ] || [ "${KEI_WIRE_CHECK:-0}" = "1" ]; then
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echo " copilot: would merge into $CFG:"
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printf '%s\n' "$desired"
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echo
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echo " copilot: launch flag to enforce: --excluded-tools='shell'"
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exit 0
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fi
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tmp=$(mktemp)
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jq -s '.[0] * .[1]' "$CFG" <(printf '%s\n' "$desired") > "$tmp"
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mv "$tmp" "$CFG"
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echo " copilot: kei-mcp registered → $CFG"
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echo " copilot: to enforce, launch with: copilot --excluded-tools='shell'"
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echo " (this disables native shell; agent must use kei_bash via MCP)"
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echo " Consider adding an alias: alias copilot='copilot --excluded-tools=shell'"
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