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feat(cost): GitHub as a cost source, read through the GitHub App installation - #2540
GitHub is a cost source on the Cost page. An org picks one of the GitHub organizations the GitHub App is already installed on, and Maple reads that organization's daily billed usage: Actions minutes and storage, Copilot, Packages, Codespaces and whatever else GitHub bills. Rows are stored per product, SKU and repository; the page breaks cost down by product.
No new credential and no migration. A GitHub source is a cost_sources row that points at the installation. Adding makes the row, removing deletes it. The sync only removes a source, when its installation is gone, suspended or no longer an organization's.
Rows. The product is the service, the SKU the usage type, the repository the resource. Billed cost is the net amount and list cost the gross one, so usage a plan allowance or a public repository made free keeps its list cost. Lines that share a day, product, SKU and repository are summed. Today and yesterday are stored as not final.
Windows. The report is asked for one calendar month at a time, back to the first day of the month three months before the current one. GitHub does not document how long it keeps usage.
A missing permission is refused up front. The billing report needs the organization permission "Administration: read". The GitHub App does not ask for it yet, so until it does and an organization accepts it, adding answers "GitHub has not granted Maple access to billing yet" with a link to the organization's GitHub App settings, and no failing source is made.
The cost code goes through the VCS provider port, which gains the billing read and the link to an installation's settings. A refused report is an answer there, not a failure, so installations without the permission stay out of error tracking.
Web. "Add source" lists GitHub. Its step shows the org's installations: an organization that can be added, one that is, a user account (which has no billing report) and a suspended one, with a link to connect GitHub when there is none. A GitHub source has a Remove action with a confirm. The first-sync wait and the empty state name GitHub where they name providers.
API.GET /internal/cost/github, PUT and DELETE /internal/cost/github/{installationId}. Reads sit behind the cloudCost flag, writes need integrations:manage and are audited (cost_source.created, cost_source.deleted).
The reworked Cost page. Merged with main's filter rail, marks and drill-down. A GitHub organization reads as "GitHub " where accounts are named, GitHub's products wear its mark in the table, the legend, the chips and the rail, and GitHub rows filter and drill down like the others.
Usage dates. A usage line's date must be a calendar day that exists, alone or followed by a UTC time. Anything else fails the pull as an unreadable answer, with nothing stored.
Cost sources now carry the id of the connection they read through, which the removal names.
One fix outside cost: the GitHub client's failure helper built its error with an undefined scope, which the error refuses, so a failed call without a scope died instead of failing.
How it was verified
Backend, Vitest, after the merge with main: 140 tests in 6 files pass (the normalizer on recorded-shape usage lines, the adapter and the source service against a fake GitHub over the real provider and App client, the sync plan block for the new profile, the sync's reconcile, the cost reads). Before the merge the existing GitHub client suite, the audit tests, 10 domain tests and the webhook route's 3 tests passed too.
Web, Vitest, 47 tests pass: main's scene and mark tests, plus the GitHub step (mixed installations, none, a failed read), a refused and an accepted add, the source row and its removal, the first-sync copy, GitHub's marks, account label and drill-down, and the lab fixture.
typecheck passes in domain, backend, views, api and web. oxlint -c .oxlintrc.effect.json is clean on the 46 changed files, with oxfmt --check, gen:anticipated-errors:check, ui:index:check and ui:patterns:check.
Two review passes over the full diff (correctness, conventions); what they found is fixed in the last commit.
Every lab state below was captured from the running web app.
Not verified live: no installation has the billing permission yet, so the report has only been read with an organization owner's token, not with an installation token. The first real pull needs the permission added to the GitHub App and accepted by an organization.
Screenshots
Before
After
Grouped by connected account:
New states:
GitHub step
Refused add
No installation
Remove confirm
Light:
GitHub step
Refused add
Remove confirm
Page
Mobile:
GitHub step
Refused add
Remove confirm
Page
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Summary by CodeRabbit
New Features
Added GitHub organization costs to the cost page, including installation selection, connection status, and controls to add or remove cost sources.
GitHub cost data includes product and repository breakdowns, up to three months of history, and first-sync guidance. GitHub requests are free.
Added audit-log entries for cost-source additions and removals, with links to the cost page.
Bug Fixes
Improved handling of unavailable billing access and changed installations; affected GitHub cost sources are removed from sync.
Documentation
Updated cloud cost documentation to cover GitHub billing support and its history window.
…allation
An organization's billed usage is read from GitHub's billing usage report: one
row per day, product, SKU and repository, in USD. The product is the service,
the SKU the usage type, the repository the resource. The billed cost is the net
amount and the list cost the gross one, so usage a plan allowance or a public
repository made free keeps its list cost.
A GitHub source keeps no credential. The org picks one of the organizations the
GitHub App is installed on, and the source points at that installation. Before
the source is made, the current month is read once: an organization that has not
accepted the billing permission is refused with what to accept and where, and
never becomes a failing source. The sync only removes a source, when its
installation is gone, suspended or no longer an organization's.
The report is asked for one calendar month at a time, back to the first day of
the month three months before the current one. Its retention is not documented,
and usage five months back was still served when checked.
The cost code reaches GitHub through the VCS provider port, which gains the
billing read and the link to an installation's settings. A refused report is an
answer there, not a failure, so installations without the permission stay out of
error tracking.
On the Cost page, Add source lists GitHub. Its step shows the org's
installations: an organization that can be added, one that is, a user account
(which has no billing report) and a suspended one, with a link to connect GitHub
when there is none. A GitHub source can be removed again, after a confirm that
says the connection stays and what adding it again brings back. Sources carry
the id of the connection they read through, which the removal names.
The GitHub client's failure helper built its error with an undefined scope,
which the error refuses: a failed call without a scope died instead of failing.
An organization on the older billing is told so whatever status GitHub refuses
it with: the body was only read for statuses other than 403 and 404, so it was
told to accept a permission it may already have.
Adding a source that exists and removing one that does not no longer write an
audit entry, and both entries name the organization.
A token without the billing permission is minted again only once it is ten
seconds old, so two reads in a row mint once, and a person who accepts the
permission and tries again is still not kept waiting. A cached token GitHub
rejects is minted again and the report asked for once more, where the pull used
to fail and hold the source for hours.
Rows are grouped by the product name they are written with, so two spellings of
a product cannot make two rows of one key.
In the dialog, the link to the GitHub App settings shows only when GitHub
refused the billing read, not for an outage or a missing role. An installation's
note is the row's second line again, which can now wrap. The cost lab tracks
added and removed GitHub organizations one by one.
No actionable comments were generated in the recent review.
Walkthrough
The change adds GitHub as a cloud-cost source. It introduces billing access and source-management APIs, monthly usage conversion and synchronization, and cost-page flows to list, add, and remove GitHub installations. It also updates lab fixtures, tests, and documentation.
The domain adds GitHub installation and source response types, typed HTTP errors, and an internal GitHub cost API group. The VCS contract and GitHub provider/client add monthly billing access and installation settings URLs.
Billing report conversion and provider packages/backend/src/services/cost/providers/github/*
The provider reads monthly usage reports, classifies responses, and converts report lines into cost rows. Tests and a fake GitHub environment cover report handling and normalization.
GitHub cost-source lifecycle and API packages/backend/src/services/cost/GithubCostSourceService*, packages/backend/src/services/cost/github-cost-sources.ts, apps/api/src/routes/internal/github-cost.http.ts, apps/api/src/runtime/*, packages/backend/src/queries/cost-reads.ts, packages/domain/src/audit-actions.ts, packages/db/src/tables/cost-sources.ts, apps/web/src/page/settings/kit/audit-log-resource.ts, packages/domain/src/http/query-engine.ts
The service lists eligible installations, checks billing access before adding sources, and removes sources by organization and installation. The API enforces permissions and records source audit events. Source summaries include the connection reference.
Cost synchronization and history windows packages/backend/src/services/cost/CostSyncService*, packages/backend/src/services/cost/sync-plan*, docs/cloud-cost-plan.md
The sync service registers the GitHub provider and reconciles ineligible sources. GitHub sync uses monthly windows and a three-month history floor. The plan document describes the GitHub billing model and sync scope.
The cost page adds GitHub installation selection, addition, and removal flows, with provider-specific status and sync guidance. The list-row component supports wrapped metadata text.
Cost lab scenarios and fixtures apps/web/src/lab/cost-*
The lab adds GitHub organization and cost fixtures, models source changes, and filters cost reads for removed providers. Tests cover installation changes and provider-removal behavior.
sequenceDiagram
participant CostPage
participant InternalAPI
participant GithubCostSourceService
participant GithubProvider
participant GithubAppClient
participant CostSyncService
CostPage->>InternalAPI: list, add, or remove GitHub cost source
InternalAPI->>GithubCostSourceService: invoke source operation
GithubCostSourceService->>GithubProvider: read current-month usage for source addition
GithubProvider->>GithubAppClient: request monthly billing report
GithubAppClient-->>GithubProvider: usage or billing result
GithubCostSourceService-->>InternalAPI: source operation result
InternalAPI-->>CostPage: installation or source response
CostSyncService->>GithubProvider: pull usage for sync window
GithubProvider->>GithubAppClient: request monthly billing report
GithubProvider-->>CostSyncService: normalized cost rows
Loading
Possibly related PRs
MapleTechLabs/maple#2542: Adds Vercel as a cost source using shared provider and cost-page contracts also changed here.
MapleTechLabs/maple#2541: Adds Cloudflare as a cost source and changes overlapping source-removal, provider, and sync contracts.
MapleTechLabs/maple#2495: Adds the organization cloud-cost flag used by GitHub source listing and addition.
Suggested reviewers:jeremyfunk
Merge Risk: Minimal · up to 221ba
GitHub is added as a cost source. The earlier concerns about date validation, the permission-settings link and the repository-breakdown copy are fixed at the current head. No merge-blocking risk remains in the reviewed changes. The GitHub App still needs the billing permission added before the first real pull can be verified.
Pre-merge checks: 4
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Title check
The title states the main change: GitHub is added as a cost source and read through the existing GitHub App installation. The changeset matches this. It adds the GitHub cost provider, the GithubCostSo…
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Explanation
The title states the main change: GitHub is added as a cost source and read through the existing GitHub App installation. The changeset matches this. It adds the GitHub cost provider, the GithubCostSourceService, the /internal/cost/github routes, and the web cost page GitHub flow. The title is specific and concise, and it does not list files or use vague terms.
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These links repeat className: "underline" at the call site. Add a kit option for an always-underlined text link, then update the existing copies in this file. textLink currently has no such option. (raw.githubusercontent.com)
As per coding guidelines, “A missing variant or option goes into the kit component, not a class string at the call site,” and “Move the old copies onto it, in the same change.”
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Review comment at @apps/web/src/page/cost/view-add-source.ts at line 199:
Add an always-underlined option to the textLink kit component, then update the existing textLink call sites in this file to use that option instead of repeating className: "underline".
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minimal, and validate.
Inline comments:
Review comments at @apps/web/src/page/cost/update.ts:
- Line 517: Update the GitHub billing failure mapping so billing-permission
refusals receive a distinct public reason, while authentication failures and
missing enhanced billing reports retain their appropriate non-permission
reasons. In the needsPermission assignment that currently checks
GITHUB_NOT_READY_CODE, check the new permission-specific reason so the settings
link appears only for billing-permission refusals.
Review comments at @apps/web/src/page/cost/view-add-source.ts:
- Line 384: Update the removal confirmation description to state that re-adding
restores the current calendar month and the three preceding months, consistent
with the sync floor. Update the corresponding scene assertion to expect that
same calendar-month window.
- Line 76: Update the GitHub source metadata in view-add-source.ts to remove the
repository breakdown promise, so its description reflects only breakdowns the
Cost page currently supports.
Review comments at @packages/backend/src/services/cost/github-cost-sources.ts:
- Around line 34-35: Update the CostSources DELETE predicate to re-check
installation eligibility with a subquery against vcs_installations matching
orgId and connectionRef. Delete a source only when its installation is still
missing, has a provider other than github, is not active, or is not an
organization; preserve the existing provider and id filters.
Review comments at
@packages/backend/src/services/cost/GithubCostSourceService.ts:
- Line 180: Update the add-source flow around readUsageMonth to check for an
existing source after validating the installation and return the existing
created: false result before requesting billing usage. Keep the unique-index
conflict handling for concurrent additions.
Review comments at
@packages/backend/src/services/cost/providers/github/normalize.ts:
- Around line 11-13: Update the date validation in the schema near dayOf so it
rejects trailing garbage and invalid calendar dates before assigning a cost day.
Accept only complete dates or supported timestamps, preserving valid GitHub date
formats so readUsageMonth can report invalid responses.
---
Nitpick comments:
Review comments at @apps/web/src/page/cost/view-add-source.ts:
- Line 199: Add an always-underlined option to the textLink kit component, then
update the existing textLink call sites in this file to use that option instead
of repeating className: "underline".
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… only a missing permission links to the App settings
A 2xx body without usageItems decoded as an empty month, which would store every day of the window empty. A 404 names both causes GitHub answers it for. The settings link shows only for a refusal the organization lifts there. A late answer to an older installations read is dropped.
The reconcile removes in one statement. Adding a source that exists answers before asking GitHub. A date with trailing text is refused. The dialog no longer promises a repository breakdown the page has no grouping for, and the removal copy names the months that come back.
Preview test and traces (head 0ca3726026, app-pr-2540.maple.dev)
Run by a separate agent that had only this PR's description. The preview organization has no GitHub installation, so it covers the dialog, the empty GitHub step and the unchanged AWS and OpenRouter paths. Adding a real organization is not covered: the GitHub App does not have the organization "Administration: read" permission yet.
Flow
Result
Add source lists AWS, OpenRouter and GitHub
pass
GitHub step with no installation: empty state, Connect GitHub goes to /sources/new?integration=github, Back returns
pass
GET /internal/cost/github: 200 with an empty list, 401 without a session
pass
AWS row links to its connect flow
pass
OpenRouter form: disabled while empty, an invalid key is refused under the field, dialog stays open
pass
Close (Escape, X, backdrop) and reopen starts clean
pass
Double click on submit sends one request; reload and browser back drop the dialog
pass
Light, dark, 375px: no sideways scroll
pass
Seen and left alone, since they are the same on main: the provider rows' description lines are cut with an ellipsis at 375px, and focus is not moved into the dialog body when a step changes.
The provider list above carries the final wording ("by product and SKU"); the description's earlier screenshots of that list still show the first wording.
Real data
The normalizer was run against two real months of an organization's billing usage read with an owner token (297 usage lines). Row totals equal the report's gross and net sums, every row key is unique, and every day of both months is present.
Traces (deployment.environment = pr-2540)
GithubCostSourceService.list, 20 newest calls: 9 ms to 206 ms. One Postgres read (SELECT vcs_installations, 14 ms in the slowest trace); the rest of the slow ones is the organization flag read (192 ms), which every cost endpoint shares. No error spans from the new code. The only error fingerprints in the window are the invalid OpenRouter key the test pasted on purpose and the requests the test blocked in the browser.
Makisuo
removed
the
preview:web
Deploy a Workers-only PR preview (no ingest/Electric); see docs/pr-previews.md
label
Nov 12, 2026
…ost page
Main's filter rail, marks and drill-down are kept as they are. GitHub joins
them: a GitHub organization reads as "GitHub <organization>" where accounts are
named, its products wear GitHub's mark in the table, the legend, the chips and
the rail (a product GitHub starts billing later too, when no other provider of
the org could bill it), its category has its glyph and its region the globe.
The lab's rail reads leave out a removed source's cost like its other reads.
The dialog and the empty state no longer promise a breakdown by SKU or
repository: usage type left the grouping control.
…tamp
The pattern took any text after the day's T and any two digits as a month's
day, so "2026-11-02Tgarbage" and "2026-11-31" were read as days. A date is now
a calendar day that exists, alone or followed by a UTC time to the second.
Anything else fails the pull as an answer that cannot be read, with nothing
stored.
🟢 Confidence 10/10 · safe to merge. Changed page, lab and normalizer code hold up; removal by source id, the refusal link and first-sync copy all trace to code I read. no findings · tests covered · risk high · 4/4 new units observable
Adds GitHub as a cost source read through the App installation: normalizer, a billing read on the provider port, internal routes, and the Cost page's installations step with add and remove. The changes since the last review hold up; the two listed webhook-enqueue errors are unrelated to this diff.
GitHub step lists installations with Add, and a GitHub source row gets Remove behind a confirm
fetchBillingUsage and installationSettingsUrl join the VCS provider port, implemented by GitHub
A usage date must be a real day or a real UTC timestamp, or the pull fails
Provider marks, removal copy and first-sync copy now name GitHub
Before merge
Manual · Add Administration: read to the GitHub App registration and accept it in one organization; until then adds are refused
After this merges, Maple checks whether they stop.
221ba3d · What was checked, coverage and telemetry details are on the Maple / review check. Reply "won't fix" to dismiss a finding, or mention @maple-review-bot to ask about one.
Preview test on the reworked Cost page (head 221ba3d7a4, app-pr-2540.maple.dev)
Run again by a separate agent after the merge of main. The preview organization has no GitHub installation, so this covers the dialog, the GitHub step with nothing connected, the API's answers and the unchanged providers. Adding a real organization is still not covered: the GitHub App lacks the organization "Administration: read" permission.
Flow
Result
Add source lists AWS, OpenRouter and GitHub ("Daily billed usage by product")
pass
GitHub step: empty state, Connect GitHub to /sources/new?integration=github, Back
pass
GET /internal/cost/github: 200 with an empty list; 401 without a session
pass
PUT for an unknown installation: 404 "This GitHub installation is not connected to the organization."; a malformed id: 400
pass
AWS link, OpenRouter form and its refusal, close and reopen
pass
Light, dark, 375px: no clipping, no sideways scroll
pass
Console and requests: only the expected refusals
pass
Traces (pr-2540): GithubCostSourceService.list 16 calls, p50 73 ms, max 259 ms; add (refused) 15 ms; remove 16 ms. No error from the new code: the fingerprints in the window are the invalid OpenRouter key the test typed and warehouse authentication errors from the minutes before the preview's warehouse branch was ready.
Makisuo
removed
the
preview:web
Deploy a Workers-only PR preview (no ingest/Electric); see docs/pr-previews.md
label
Nov 13, 2026
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Makisuo
added
the
preview:web
What changed
GitHub is a cost source on the Cost page. An org picks one of the GitHub organizations the GitHub App is already installed on, and Maple reads that organization's daily billed usage: Actions minutes and storage, Copilot, Packages, Codespaces and whatever else GitHub bills. Rows are stored per product, SKU and repository; the page breaks cost down by product.
cost_sourcesrow that points at the installation. Adding makes the row, removing deletes it. The sync only removes a source, when its installation is gone, suspended or no longer an organization's.GET /internal/cost/github,PUTandDELETE /internal/cost/github/{installationId}. Reads sit behind thecloudCostflag, writes needintegrations:manageand are audited (cost_source.created,cost_source.deleted).How it was verified
typecheckpasses in domain, backend, views, api and web.oxlint -c .oxlintrc.effect.jsonis clean on the 46 changed files, withoxfmt --check,gen:anticipated-errors:check,ui:index:checkandui:patterns:check.Not verified live: no installation has the billing permission yet, so the report has only been read with an organization owner's token, not with an installation token. The first real pull needs the permission added to the GitHub App and accepted by an organization.
Screenshots
Grouped by connected account:
New states:
Light:
Mobile:
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