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feat(providers): Gmail EmailSender adapter (HT-19) #17

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Merged
zaridan merged 6 commits into from
Jul 11, 2026
Merged

feat(providers): Gmail EmailSender adapter (HT-19) #17

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b2a1479
feat(providers): Gmail EmailSender adapter (HT-19)
zaridan Jul 11, 2026
7cf1b7e
fix(providers): sanitize advisory msg-ids + redact echoed base64 (HT-19)
zaridan Jul 11, 2026
35c8823
fix(providers): octet-based length bounds + address length caps (HT-19)
zaridan Jul 11, 2026
3140427
fix(providers): bound the subject line too (HT-19)
zaridan Jul 11, 2026
fa6cf84
chore(providers): suppress noControlCharactersInRegex on the injectio…
zaridan Jul 11, 2026
9dc97c3
fix(providers): sanitize subject control chars; bound the Gmail call …
zaridan Jul 11, 2026
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76 changes: 76 additions & 0 deletions package-lock.json
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1 change: 1 addition & 0 deletions package.json
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Expand Up @@ -19,6 +19,7 @@
},
"dependencies": {
"@electric-sql/pglite": "^0.5.4",
"mimetext": "^3.0.28",
"postal-mime": "^2.7.5"
},
"devDependencies": {
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7 changes: 7 additions & 0 deletions src/providers/README.md
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Expand Up @@ -23,6 +23,13 @@ Concrete implementations — **adapters** — live in `src/providers/adapters/<n
(e.g. `src/providers/adapters/vercel-queues/`). This task defines the
contracts only; no adapters are built here.

The first real adapter is `src/providers/adapters/gmail/` (HT-19): a Node-runtime
`EmailSender` for `users.messages.send`, built on `mimetext` for raw-MIME
construction (see its `mime.ts` for the verbatim-`Message-ID` contract and a
mimetext EOL gotcha) with OAuth2 token acquisition injected via a
`getAccessToken` callback — token refresh/rotation is the composition root's
concern, not the adapter's.

An adapter is **selected at the composition root** — the small amount of
top-level wiring code (API route handlers, cron entry points, app
bootstrap) that constructs concrete provider instances from env/config and
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9 changes: 9 additions & 0 deletions src/providers/adapters/gmail/index.ts
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@@ -0,0 +1,9 @@
/**
* Barrel for the Gmail `EmailSender` adapter. Composition roots import from
* here (never from `sender.ts`/`mime.ts` directly) — see
* `src/providers/README.md`'s "adapters are selected at the composition
* root" rule.
*/

export type { GmailEmailSenderOptions } from './sender.js'
export { createGmailEmailSender } from './sender.js'
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