Cross Agent

Experimental standalone agent delegation plugin and skill for Claude Code, Codex, and other AI coding agents.

Version: v0.0.8

Plugins

Plugin	Version	Skills
cross-agent	0.0.8	cross-agent, transfer-context

Skills

Skill	Version	Command	Description
cross-agent	0.0.8	/cross-agent	Delegate a consultation or an installed skill to another configured agent CLI, keeping task and provider session identity.
transfer-context	0.0.8	/transfer-context	Save and resume work across agent sessions with a verifiable checkpoint.

Overview

1. Consult another configured agent or delegate a host-installed skill while preserving compatible task, host session and provider session identity.
2. Use either bracket order, for example cross-agent claude opus low [consult on this design] or cross-agent [resolve-issue issue-url --auto] claude opus low. Arguments inside the brackets belong to the assigned skill; outer --auto is invalid.
3. Basic delegation has no workflow dependency. An installed owner adapter supplies optional domain rules, validates the result and performs domain intake.
4. The separate transfer-context skill saves and resumes work across sessions with a verifiable checkpoint.
5. Since v0.0.7 the three manifests are back (.claude-plugin/, .codex-plugin/, .antigravity-plugin/). Claude Code 2.1.322 does accept a root plugin.json; the empty plugin seen earlier came from the marketplace's git-subdir source with path: ".", which installs only top-level files, and the marketplace will pin Claude Code entries with a url source. The 2026-11-07 host checks (Claude Code 2.1.319, Codex 0.166.0, Antigravity 1.5.2) covered the previous root-manifest layout. On 2026-11-10 the three-manifest layout installed from the branch with Claude Code 2.1.322 and Codex 0.167.0 (both skills at 0.0.7); invocation and Antigravity are not checked.
6. Since v0.0.8 an execution run defaults to the full profile; --mode no-network or --mode read-only narrows it. run, status, adopt, init-host, cancel and wait build the host JSON from the repository; Antigravity models stay unavailable until a live probe.

Install

Claude Code:

claude plugin marketplace add sentimony/marketplace
claude plugin install cross-agent@sentimony

Codex:

codex plugin marketplace add sentimony/marketplace
codex plugin add cross-agent@sentimony

Documentation

See protocol, skill context, configuration and extraction map and registry migration.

Local checks use Python standard library fixtures only:

python3 -B scripts/run_tests.py

The same command runs in local CI with a private HOME/PATH, no inherited provider/auth environment and no reachable native agent CLI. Fixture tests exercise public code only.

Evidence	Local state
Plugin / skill versions	Platform manifests and skill metadata, versioned independently
Generic parser/session/protocol/resources	Credential-free unit and fake-CLI checks
Registry installation-root move	Synthetic public-module relocation fixture
Owner integration	Requires the separately supplied, compatible installed owner adapter
Native host installation and skill invocation	Three-manifest layout, 2026-11-10, url source from the branch: Claude Code 2.1.322 and Codex 0.167.0 install PASS (both skills at 0.0.7), invocation not checked; Antigravity not checked. Previous root-manifest layout, 2026-11-07: Claude Code, Codex and Antigravity install and invocation PASS
Provider resume / release pair	Unverified; separate approval and evidence required

The delegation runtime creates no remote repositories, installs, logins or releases. Live provider calls require explicit current authority.

Release preparation and immutable tags follow the release checklist. The owner accepted unverified native coverage for the initial experimental release; track the remaining evidence in issue 31.