fix(evi): drop the linear mcp connection and raise the session limits

[HugoRCD]

Two changes, both from what the EVL-213 run showed.

The Linear MCP connection is removed

It does not degrade when misconfigured — it takes the run down. On that thread every GitHub tool returned Cannot read properties of undefined (reading 'toLowerCase'), thrown from isProvisionableConnectorUid in @vercel/connect/dist/eve/provision-oauth-connector.js, the OAuth connector provisioning path this connection uses. Five calls, same error, and Evi finished the task by reading the repo over HTTP from the sandbox instead.

Local evals never caught it: provisionEveOAuthConnector returns early without an OIDC token, so the code only runs deployed. I said earlier that a broken connection would just mean "Evi answers without Linear" — that was wrong, and this is the correction.

The Linear channel stays. Only the MCP connection goes, until Connect can mint an app token for that connector.

Session limits raised

5M input was set defensively before there was anything to measure. That thread spent 2.8M input across two turns, so a conversation was about three turns from being cut off mid-thread. Now 20M input / 250k output — still half of eve's default, and it bounds a loop rather than a long conversation. Cost is not what these protect: that session billed $0.0103 at a 95% cache rate.

Also

AGENTS.md gains one line under "Code style — no slop": a comment states a durable constraint in one or two lines, and the investigation that produced it belongs in the PR body or a doc. Applied to the three agent/lib files here.

Testing

pnpm eval 16/16, 86 gates. eve info reports 0 errors, connections down to docs, channels unchanged. Lint and typecheck clean.

Summary by CodeRabbit

• New Features
  • Increased supported session limits to accommodate substantially larger inputs and outputs.
• Changes
  • Removed the built-in Linear connection option.
• Documentation
  • Clarified channel naming, environment behavior, and spend-tag reporting.
  • Added guidance about OAuth connection configuration issues that can interrupt runs and affect GitHub tool availability.
  • Updated comment-writing guidance to favor concise descriptions of lasting constraints.

[changeset-bot]

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Latest commit: ae284c1

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[vercel]

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Project	Deployment	Actions	Updated (UTC)
evi	Ready	Preview	Aug 7, 2026 9:58pm
evlog-docs	Ready	Preview, v0	Aug 7, 2026 9:58pm
evlog-render-lab	Ready	Preview	Aug 7, 2026 9:58pm
evlog-telemetry	Ready	Preview	Aug 7, 2026 9:58pm
just-use-evlog	Ready	Preview	Aug 7, 2026 9:58pm

[github-actions]

Thank you for following the naming conventions! 🙏

[pkg-pr-new]

npm i https://pkg.pr.new/@evlog/cli@512

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npm i https://pkg.pr.new/@evlog/telemetry@512

commit: ae284c1

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: c16a15f8-da36-47ae-ab33-082360822833

📥 Commits

Reviewing files that changed from the base of the PR and between 80f5aec and ae284c1.

📒 Files selected for processing (7)

• AGENTS.md
• apps/evi/agent/agent.ts
• apps/evi/agent/connections/linear.ts
• apps/evi/agent/lib/channel.ts
• apps/evi/agent/lib/environment.ts
• apps/evi/agent/lib/gateway.ts
• apps/evi/docs/notes.md

---

📝 Walkthrough

Walkthrough

The changes increase agent session token limits, remove the Linear MCP connection, document OAuth failure behavior, revise runtime metadata documentation, and add guidance for concise comments.

Changes

Agent configuration and documentation

Layer / File(s)	Summary
Session limits and Linear connection behavior apps/evi/agent/agent.ts, apps/evi/agent/connections/linear.ts, apps/evi/docs/notes.md	Session input and output limits increased. The Linear MCP connection was removed. The notes document related production OAuth failure behavior.
Runtime metadata documentation apps/evi/agent/lib/channel.ts, apps/evi/agent/lib/environment.ts, apps/evi/agent/lib/gateway.ts	Documentation now describes channel names, environment labels, deployment-mode availability, and gateway request tags.
Comment-writing guidance AGENTS.md	Comments must state concise, durable constraints without issue references, measurements, or historical narratives.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• HugoRCD/evlog#508: Introduced the session limits, runtime documentation areas, and Linear connection updated by this PR.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/evi-drop-linear-connection

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