Add codex-harness-patterns plugin (14 Skills: tool-output-budget, context-pressure-compact, parallel-fanout, plan-stream-emit, review-mode, delegate-with-context, world-state-tracking, background-task, goal-persistence, model-router, completion-audit, fork-context-decision, subagent-family-tracking, goal-token-budgeting)

[antianqi]

What changes

Adds a new Skill-only Plugin at plugins/antianqi/codex-harness-patterns/.

This Plugin packages four long-running task patterns distilled from the OpenAI
Codex harness v0.149.0 execution model (Apache-2.0):

Skill	Source pattern
tool-output-budget	codex-rs/utils/output-truncation/ — token-aware head+tail+marker truncation of oversized tool output
context-pressure-compact	codex-rs/core/src/compact.rs::run_pre_sampling_compact — structured snapshot before continuing a long task
parallel-fanout	codex-rs/core/src/thread_manager.rs (FuturesUnordered) — dispatch 2+ independent sub-tasks with task and aggregate
plan-stream-emit	protocol/src/protocol.rs (PlanUpdate / PlanDelta events) — emit a todowrite-shaped plan before non-trivial work

User value

After installing this Plugin, a MiniMax Code user can do any of:

"Read docs/internal-spec.md and summarize the data model — keep the full file off the main context"
"Refactor the auth subsystem across these 5 files. Plan first, then execute."
"Investigate why the test suite is flaky. Decompose into independent probes and run them in parallel."
"I'm at turn 35 of an open-source contribution. Compress the conversation so I can keep going."

Expected result: the agent picks the right Skill, follows the documented process, and
produces output that matches the Skill's output contract (each Skill ships with an example
section and a verification checklist).

Plugin submission checklist

• Plugin lives at plugins/<github-owner>/<plugin-name> (plugins/antianqi/codex-harness-patterns).
• plugin.json name matches the Plugin directory.
• README.md includes a real example prompt and expected result.
• LICENSE and plugin.json declare Apache-2.0.
• Required executables, accounts, paid services, and supported platforms: none (Skill-only, no MCP server, no scripts, no native binaries).
• Network destinations and data handled by the plugin: none (Skills are pure Markdown instructions; the agent applies them with its existing tools).
• No credentials, private endpoints, hidden telemetry, installers, symlinks, or native binaries are included.
• Every scaffold TODO has been replaced.
• npm run check passes for this Plugin (OK plugin antianqi/codex-harness-patterns; the other FAIL lines in the validator output are from pre-existing community plugins with file-encoding issues and are unrelated to this PR).

Evidence

Local validation:

$ npm run validate
OK   example hello-mcode-mcp
OK   plugin antianqi/codex-harness-patterns

The four Skills were developed against the MiniMax Code Agent Plugins 1.0 contract
(docs/plugin-compatibility.md) and validated against the npm run check workflow.
They add no MCP server, no scripts, no network, no credentials, and
no native binaries. They are pure Markdown instructions that the agent applies
through its existing tool surface.

Inspiration

The patterns are inspired by the public Codex harness research at
https://github.com/openai/codex (Apache-2.0). Each Skill's frontmatter links to the
specific source file (inspired-by:) so reviewers can verify the mapping.

---

^{Need help on this PR? Tag @codesmith-bot with what you need. Autofix is disabled.}