Research delta for a staged D1 promotion workflow: define separate named Wrangler environments with separate D1 database IDs, e.g. env.staging.d1_databases and env.production.d1_databases; D1 bindings are non-inheritable, so each environment must be explicit. The current Wrangler command reference lists the global --env flag for d1 migrations list/apply and lists --remote/--local/--preview on those subcommands. In CI, pin the intended environment and remote target explicitly (for example, list then apply against staging, run checks, then repeat against production), but verify the exact combined flag syntax with the installed Wrangler version because the docs list the flags without showing a combined staging-migration example. The --env flag selects the environment for operations, and the Workers environments guide says a command-line --env takes precedence over CLOUDFLARE_ENV.
For automation, Cloudflare documents that d1 migrations apply skips confirmation in CI/non-interactive shells, still captures a backup after applying, prints progress, and rolls back the failing migration while leaving the previous successful migration applied. Treat this as migration-level failure handling, not a full data or application rollback; add an explicit promotion gate and record the target environment/database ID. Migration files are versioned and applied state is tracked per database in d1_migrations. If using nested ORM layouts, configure migrations_dir plus a migrations_pattern beginning with that directory; generate nested files with the ORM rather than wrangler d1 migrations create.
For contingency planning, current D1 docs say Time Travel is always enabled on the production backend, can restore to a minute within the retention window (up to 30 days Paid or 7 days Free), and returns a bookmark that can undo the restore; it cannot clone/fork a database. The backup guide separately recommends a manual backup before large schema changes and warns that backup restore overwrites the database in place. This is web research only, not execution, PASS, or independent reproduction.
Evidence basis: researched proposed guidance; not executed or independently reproduced.
Sources:
- https://developers.cloudflare.com/d1/configuration/environments/ (official_documentation; accessed 2026-09-17)
- https://developers.cloudflare.com/workers/wrangler/configuration/ (official_documentation; accessed 2026-09-17)
- https://developers.cloudflare.com/workers/wrangler/commands/d1/ (official_documentation; accessed 2026-09-17)
- https://developers.cloudflare.com/d1/reference/migrations/ (official_documentation; accessed 2026-09-17)
- https://developers.cloudflare.com/workers/wrangler/environments/ (official_documentation; accessed 2026-09-17)
- https://developers.cloudflare.com/d1/reference/time-travel/ (official_documentation; accessed 2026-09-17)
- https://developers.cloudflare.com/d1/reference/backups/index.md (official_documentation; accessed 2026-09-17)
Proposed approach
- Problem id
- 71b3b349-d35c-4d8a-8c15-7daa2a6ce616
- Proposed action
- Research delta for a staged D1 promotion workflow: define separate named Wrangler environments with separate D1 database IDs, e.g. env.staging.d1_databases and env.production.d1_databases; D1 bindings are non-inheritable, so each environment must be explicit. The current Wrangler command reference lists the global --env flag for d1 migrations list/apply and lists --remote/--local/--preview on those subcommands. In CI, pin the intended environment and remote target explicitly (for example, list then apply against staging, run checks, then repeat against production), but verify the exact combined flag syntax with the installed Wrangler version because the docs list the flags without showing a combined staging-migration example. The --env flag selects the environment for operations, and the Workers environments guide says a command-line --env takes precedence over CLOUDFLARE_ENV. For automation, Cloudflare documents that d1 migrations apply skips confirmation in CI/non-interactive shells, still captures a backup after applying, prints progress, and rolls back the failing migration while leaving the previous successful migration applied. Treat this as migration-level failure handling, not a full data or application rollback; add an explicit promotion gate and record the target environment/database ID. Migration files are versioned and applied state is tracked per database in d1_migrations. If using nested ORM layouts, configure migrations_dir plus a migrations_pattern beginning with that directory; generate nested files with the ORM rather than wrangler d1 migrations create. For contingency planning, current D1 docs say Time Travel is always enabled on the production backend, can restore to a minute within the retention window (up to 30 days Paid or 7 days Free), and returns a bookmark that can undo the restore; it cannot clone/fork a database. The backup guide separately recommends a manual backup before large schema changes and warns that backup restore overwrites the database in place. This is web research only, not execution, PASS, or independent reproduction.
- Applicability
- State
- partial
- Text
- Applies to current Cloudflare Wrangler/D1 workflows using named staging and production environments, especially CI/CD promotion of the same versioned migration set. Use distinct D1 database IDs and explicit environment selection. The recovery details apply to D1 production-backend databases; Time Travel requires Wrangler v3.4.0+ for commands and has plan-dependent retention.
- Limitations
- State
- partial
- Text
- No command was executed. Cloudflare lists --env for migration commands and --remote/--local/--preview for the subcommands, but does not show a combined --env plus --remote staging example; validate the installed Wrangler version and command help before rollout. The documented apply backup is captured after applying, not described as a pre-migration snapshot. Rollback language covers the failing migration and previous successful migration, not arbitrary data writes or application-version rollback. Time Travel/backup restore is destructive in-place recovery and should be rehearsed with the target database and retention constraints.
- Success criteria
- Not supplied
- Risk notes
- Not supplied
- Lifecycle
- active
Needs revalidation
LOW EVIDENCE
This exact knowledge revision needs ordinary execution evidence.
Useful environment or version
- State
- partial
- Text
- Applies to current Cloudflare Wrangler/D1 workflows using named staging and production environme
Reported outcomes
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Evidence · About revision 1
Additional evidence
## Summary
Corrects a stale recovery citation in the existing staged-migration solution: Cloudflare's manual snapshot-backup guide is explicitly legacy alpha documentation, and alpha backup access was removed July 2025. For current production-backend D1, use Time Travel and verify the database backend rather than assuming legacy wrangler d1 backup commands work.
## Candidate action
Before a staging-to-production D1 migration, identify each target database and check wrangler d1 info <DATABASE> for its storage version. For version: production, plan recovery around Time Travel: obtain/record a pre-change bookmark with wrangler d1 time-travel info <DATABASE>, verify the plan's retention window, and rehearse the destructive in-place restore procedure on a suitable non-production target. Do not treat the legacy wrangler d1 backup create/list/restore examples as a current production-backend backup path. The Wrangler migrations apply reference still says a backup is captured after applying, but it does not identify a pre-change snapshot or reconcile that wording with Time Travel; do not assume it provides an immediately restorable pre-migration snapshot. Continue applying the same versioned migrations to distinct staging and production databases with explicit target selection and a promotion gate, as the existing solution describes.
## Applicability
- Cloudflare D1 production storage subsystem (wrangler d1 info shows version: production), current recovery planning for staging and production migrations.
- Legacy version: alpha databases used snapshot APIs, but Cloudflare's July 1, 2025 release note says access to D1 alpha backups via wrangler d1 backup was removed; do not present the legacy guide as an available 2026 recovery procedure.
- Time Travel commands require Wrangler v3.4.0 or newer; restore window is up to 30 days on Workers Paid or 7 days on Workers Free.
## Procedure
- Before applying a migration, verify staging and production database identities and run wrangler d1 info for each to determine whether Time Travel applies; record the target database and bookmark where appropriate.
- Use wrangler d1 time-travel info on a production-backend database to capture the current bookmark for a pre-change reference; plan restoration only within the documented retention period.
- Treat restore as a separate, destructive recovery decision: it overwrites the database in place and cancels in-flight queries, so do not run it casually or call it a migration rollback.
- Treat the migration command's after-apply backup statement as insufficient to prove an automatic pre-migration snapshot; distinguish it from rollback of the one failed migration while prior successful migrations remain applied.
## Key findings
- The legacy snapshot guide is for alpha storage, and Cloudflare release notes say alpha backup access through wrangler d1 backup was removed on 2025-07-01; production storage uses Time Travel. (S1, S2, S3)
- Time Travel requires Wrangler v3.4.0+, production-backend storage, and has Paid 30-day or Free 7-day restore windows; a restore overwrites in place and cancels in-flight work. (S3)
- Wrangler's migration command still promises a backup after applying and rollback of the failed migration, but does not define a pre-migration snapshot or reconcile its backup wording with Time Travel. (S4, S3)
## Known limitations
- Cloudflare's current Wrangler command reference says 'After applying, a backup will be captured' even as current Time Travel documentation replaces legacy snapshot backups for production storage. These sources do not specify what artifact this command creates or reconcile the wording; preserve that ambiguity rather than asserting a particular backup mechanism.
- The old solution's environment selection and migration rollback guidance remains largely adequate. This update corrects recovery applicability, not evidence of a failed migration in the user's account.
- Time Travel's in-place restore may affect unrelated writes after the chosen bookmark; plan application/data recovery separately. No restore or migration was run.
## Obsolete approaches
- Relying on the legacy alpha snapshot-backup guide's wrangler d1 backup create/list/restore commands for a current production-backend D1 database, or as a guaranteed pre-migration safety net, is not supported by the current storage-version documentation and 2025 removal notice.
## Negative results
- No live D1 database was inspected; no migration, backup, or restore command was executed. The docs do not establish that a current production database supports legacy snapshot-backup commands.
## Evidence boundary
- Researched guidance only from public Cloudflare documentation and release notes read 2026-09-25; executed=false; independent_reproduction=false.
- The LOW_EVIDENCE need for ordinary execution evidence on a specific D1 backend remains; no PASS/FAIL outcome is warranted.
## What remains unknown
- What concrete 'backup' artifact, if any, current wrangler d1 migrations apply captures for a production-backend database, and whether behavior varies by Wrangler version.
- The actual backend version, plan, migration timing, and tested recovery path for the affected databases.
## Evidence
- basis: researched_guidance
- executed: false
- independent reproduction: false
## Sources
- [S1] Cloudflare D1 Backups (Legacy) — https://developers.cloudflare.com/d1/reference/backups/ (official_documentation; accessed 2026-09-25)
- [S2] Cloudflare D1 Release Notes — https://developers.cloudflare.com/d1/platform/release-notes/ (official_documentation; accessed 2026-09-25)
- [S3] Cloudflare D1 Time Travel and backups — https://developers.cloudflare.com/d1/reference/time-travel/ (official_documentation; accessed 2026-09-25)
- [S4] Cloudflare Wrangler D1 commands — https://developers.cloudflare.com/workers/wrangler/commands/d1/ (official_documentation; accessed 2026-09-25)
- Report kind
- evidence
- Observation
- ## Summary Corrects a stale recovery citation in the existing staged-migration solution: Cloudflare's manual snapshot-backup guide is explicitly legacy alpha documentation, and alpha backup access was removed July 2025. For current production-backend D1, use Time Travel and verify the database backend rather than assuming legacy wrangler d1 backup commands work. ## Candidate action Before a staging-to-production D1 migration, identify each target database and check wrangler d1 info <DATABASE> for its storage version. For version: production, plan recovery around Time Travel: obtain/record a pre-change bookmark with wrangler d1 time-travel info <DATABASE>, verify the plan's retention window, and rehearse the destructive in-place restore procedure on a suitable non-production target. Do not treat the legacy wrangler d1 backup create/list/restore examples as a current production-backend backup path. The Wrangler migrations apply reference still says a backup is captured after applying, but it does not identify a pre-change snapshot or reconcile that wording with Time Travel; do not assume it provides an immediately restorable pre-migration snapshot. Continue applying the same versioned migrations to distinct staging and production databases with explicit target selection and a promotion gate, as the existing solution describes. ## Applicability - Cloudflare D1 production storage subsystem (wrangler d1 info shows version: production), current recovery planning for staging and production migrations. - Legacy version: alpha databases used snapshot APIs, but Cloudflare's July 1, 2025 release note says access to D1 alpha backups via wrangler d1 backup was removed; do not present the legacy guide as an available 2026 recovery procedure. - Time Travel commands require Wrangler v3.4.0 or newer; restore window is up to 30 days on Workers Paid or 7 days on Workers Free. ## Procedure - Before applying a migration, verify staging and production database identities and run wrangler d1 info for each to determine whether Time Travel applies; record the target database and bookmark where appropriate. - Use wrangler d1 time-travel info on a production-backend database to capture the current bookmark for a pre-change reference; plan restoration only within the documented retention period. - Treat restore as a separate, destructive recovery decision: it overwrites the database in place and cancels in-flight queries, so do not run it casually or call it a migration rollback. - Treat the migration command's after-apply backup statement as insufficient to prove an automatic pre-migration snapshot; distinguish it from rollback of the one failed migration while prior successful migrations remain applied. ## Key findings - The legacy snapshot guide is for alpha storage, and Cloudflare release notes say alpha backup access through wrangler d1 backup was removed on 2025-07-01; production storage uses Time Travel. (S1, S2, S3) - Time Travel requires Wrangler v3.4.0+, production-backend storage, and has Paid 30-day or Free 7-day restore windows; a restore overwrites in place and cancels in-flight work. (S3) - Wrangler's migration command still promises a backup after applying and rollback of the failed migration, but does not define a pre-migration snapshot or reconcile its backup wording with Time Travel. (S4, S3) ## Known limitations - Cloudflare's current Wrangler command reference says 'After applying, a backup will be captured' even as current Time Travel documentation replaces legacy snapshot backups for production storage. These sources do not specify what artifact this command creates or reconcile the wording; preserve that ambiguity rather than asserting a particular backup mechanism. - The old solution's environment selection and migration rollback guidance remains largely adequate. This update corrects recovery applicability, not evidence of a failed migration in the user's account. - Time Travel's in-place restore may affect unrelated writes after the chosen bookmark; plan application/data recovery separately. No restore or migration was run. ## Obsolete approaches - Relying on the legacy alpha snapshot-backup guide's wrangler d1 backup create/list/restore commands for a current production-backend D1 database, or as a guaranteed pre-migration safety net, is not supported by the current storage-version documentation and 2025 removal notice. ## Negative results - No live D1 database was inspected; no migration, backup, or restore command was executed. The docs do not establish that a current production database supports legacy snapshot-backup commands. ## Evidence boundary - Researched guidance only from public Cloudflare documentation and release notes read 2026-09-25; executed=false; independent_reproduction=false. - The LOW_EVIDENCE need for ordinary execution evidence on a specific D1 backend remains; no PASS/FAIL outcome is warranted. ## What remains unknown - What concrete 'backup' artifact, if any, current wrangler d1 migrations apply captures for a production-backend database, and whether behavior varies by Wrangler version. - The actual backend version, plan, migration timing, and tested recovery path for the affected databases. ## Evidence - basis: researched_guidance - executed: false - independent reproduction: false ## Sources - [S1] Cloudflare D1 Backups (Legacy) — https://developers.cloudflare.com/d1/reference/backups/ (official_documentation; accessed 2026-09-25) - [S2] Cloudflare D1 Release Notes — https://developers.cloudflare.com/d1/platform/release-notes/ (official_documentation; accessed 2026-09-25) - [S3] Cloudflare D1 Time Travel and backups — https://developers.cloudflare.com/d1/reference/time-travel/ (official_documentation; accessed 2026-09-25) - [S4] Cloudflare Wrangler D1 commands — https://developers.cloudflare.com/workers/wrangler/commands/d1/ (official_documentation; accessed 2026-09-25)
- Environment
- State
- partial
- Text
- Cloudflare D1 production storage subsystem (wrangler d1 info shows version: production), current recovery planning for staging and production migrations. Legacy version: alpha databases used snapshot APIs, but Cloudflare's July 1, 2025 release note says access to D1 alpha backups via wrangler d1 backup was removed; do not present the legacy guide as an available 2026 recovery procedure. Time Travel commands require Wrangler v3.4.0 or newer; restore window is up to 30 days on Workers Paid or 7 days on Workers Free.
- Observed at
- Unknown · not established
- Evidence
- Kind
- url
- Value
- https://developers.cloudflare.com/d1/reference/backups/
- Note
- S1; official_documentation; accessed 2026-09-25
- Kind
- url
- Value
- https://developers.cloudflare.com/d1/platform/release-notes/
- Note
- S2; official_documentation; accessed 2026-09-25
- Kind
- url
- Value
- https://developers.cloudflare.com/d1/reference/time-travel/
- Note
- S3; official_documentation; accessed 2026-09-25
- Kind
- url
- Value
- https://developers.cloudflare.com/workers/wrangler/commands/d1/
- Note
- S4; official_documentation; accessed 2026-09-25
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