[piotrnowakowski]

Devin sessions now show up on the Usage page alongside the other providers.

• New devin usage source on the ACP Registry driver. For each registry Devin instance, it reads the Devin CLI's sessions.db read-only ($DEVIN_SESSIONS_DIR, else $XDG_DATA_HOME/devin/cli). Other ACP agents and local commands are skipped.
• Each inference counts once: Devin stores one request on several message nodes with identical metrics, so records dedupe by request_id.
• claude-opus-5-5-high-fast is priced as claude-opus-5-5 at the fast tier. Devin bills in ACUs, so cost is the API-rate estimate.
• Web and mobile presentation, plus docs/user/usage.md.

Proposed in Ideas discussion #27535, which has no maintainer approval yet. Limits stay out of scope; #26381 covers them.

Validation: the new devinUsage.test.ts covers dedupe, the time window, model mapping, a missing database, and instance filtering. vp run check:changed passes. On a copy of a real Devin 3000.11.234 database, 80 assistant nodes became 40 records ($2.79 estimate). The screenshots below are from vp run dev with the same home data, on main and on this branch.

Not checked: macOS and Windows paths, and Devin's newer files-based session store, which this build can migrate to.

Before	After

Written by Claude Opus 5.5 in Claude Code.

🤖 Generated with Claude Code

[macroscopeapp]

Approvability

Verdict: Needs Human Approval

Macroscope's review found this PR requires human approval — Devin history is automatically included in Usage when its local database exists, changing displayed totals and adding API-rate cost estimates rather than actual ACU charges. Human review is needed to confirm this default inclusion and cost presentation.

^{You can add or adjust custom eligibility rules. Learn more.}

[piotrnowakowski]

Both points follow how the other usage sources already work, and the maintainer decision is open in #27535:

• Included by default. Claude Code, Codex, Pi and OpenCode history is read from local stores whenever they exist, whether or not T3 started the session. Devin's sessions.db works the same way, and the reader opens it read-only.
• API-rate estimate. The Usage page already labels totals "API estimate" and says they are not your subscription bill. Devin's ACU charges aren't stored locally, so reportedCostUsd stays null and shared pricing estimates the cost, as it does for subscription-billed Claude and Codex usage.

[coderabbitai]

No actionable comments were generated in the recent review.

Recent review info

Run configuration

• Source mode: Auto
• Repository: pingdotgg/t3code
• Branch: main
• File: .coderabbit.config.ts
• Commit: 60aec28
• Layers: Repository TS config
• Review profile: CHILL
• Plan: Advanced
• Run ID: 546d9be6-dbb0-4685-8f16-34dd6b008168

Commits

Reviewing files that changed from the base of the PR and between a15bccf and f6175b1.

Files selected for processing: 1

• packages/provider-acp-registry/src/server/devinUsage.test.ts

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Walkthrough

The change adds a Devin usage reader for CLI session databases, registers it with the ACP registry driver, and adds Devin to usage contracts, provider presentation, and documentation.

Changes: Devin usage history

Layer / File(s)	Summary
Read Devin usage from session databases packages/provider-acp-registry/src/server/devinUsage.ts, packages/provider-acp-registry/src/server/devinUsage.test.ts	The reader resolves session directories, parses assistant-message metadata, filters and deduplicates records, and reports missing databases or read errors. Tests cover parsed records, duplicate request IDs, time-window filtering, missing databases, and registry-instance selection.
Connect the reader to the provider packages/contracts/src/usage.ts, packages/provider-acp-registry/src/server/driver.ts, apps/server/src/provider/builtInDrivers.ts	The usage contract accepts devin. The ACP registry driver provides the Devin reader and declares its environment requirements. The built-in driver list includes the ACP registry driver.
Present and document Devin usage apps/mobile/src/features/usage/usageProviders.ts, apps/web/src/components/usage/usageProviders.ts, apps/web/src/components/usage/UsageProviderChart.test.ts, docs/user/usage.md	Mobile and web usage-provider configuration includes Devin. The chart test expects a Devin band. The documentation describes Devin’s session database, directory override, estimated costs, and filter value. It also lists Muse Code as a usage history source.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant devinUsageReader
  participant FileSystem
  participant sessionsDb as sessions.db
  devinUsageReader->>FileSystem: Resolve and check database path
  devinUsageReader->>sessionsDb: Query assistant messages
  sessionsDb-->>devinUsageReader: Return message rows
  devinUsageReader->>devinUsageReader: Parse and deduplicate usage records

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Possibly related issues

• pingdotgg/t3code#20246: This change deduplicates Devin records by request ID, which may intersect with the issue’s concern about undercounting from deduplication, although the issue describes a different provider and identical-metric records.

Suggested reviewers: maria-rcks

Merge Risk: Minimal · up to f6175

The prior cross-platform test risk is fixed, and no confirmed merge-blocking issue remains.

Pre-merge checks: 3 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Description check		The description explains the implementation, validation, screenshots, and known limitations, but it does not follow the required section structure. It also states that the linked Ideas discussion has …	Organize the description under Problem, Change, Scope and approval, and Verification headings. Add the problem and expected behavior, provide maintainer approval or explain why this focused change qualifies without prior approval, and retai…

Passed checks: 3 passed

Check name	Status	Explanation
Title check		The title clearly and concisely describes the main change: counting Devin usage history from its local sessions database.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Description check

Explanation

The description explains the implementation, validation, screenshots, and known limitations, but it does not follow the required section structure. It also states that the linked Ideas discussion has no maintainer approval and does not provide an approval exemption.

Resolution

Organize the description under Problem, Change, Scope and approval, and Verification headings. Add the problem and expected behavior, provide maintainer approval or explain why this focused change qualifies without prior approval, and retain the focused validation results and unchecked platform details.

Finishing Touches

Generate unit tests (beta)

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[coderabbitai]

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[vxirau]

Nice, this pairs well with realhasanshoaib#1 (stacked on #26381), which fills the Limits side with Devin's daily and weekly allowance from the CLI's GetUserStatus. With both, Devin gets Cost, Tokens and Limits like the other providers. They both touch the AcpRegistryDriverEnv line in driver.ts, so whichever lands second needs a one-line rebase.

[juliusmarminge]

Thanks @piotrnowakowski for the earlier Devin history work and tests. Closing this in favor of #30248 by @screen-gd, which also reads and deduplicates Devin session history and has newer work and broader verification. This branch has not been updated since November 2, and main has changed the affected files since then. The DEVIN_SESSIONS_DIR override here is worth considering separately if still needed.