| Dimension | Shared | Only in A | Only in B | Overlap |
|---|---|---|---|---|
| Sections | 0 | 14 | 6 | 0% |
| Commands | 1 | 23 | 3 | 4% |
| Section tags | 2 | 7 | 1 | 20% |
What each file covers
Sections
0 shared · 14 only in A · 6 only in B- − Instructions for GitHub Copilot
- − Purpose
- − Single Sources of Truth (SOT)
- − Build & Run (local dev; use Makefile first)
- − Tests & Lint
- − Project Structure & Languages
- − Code Review Instructions (for Copilot)
- − Style & Patterns
- − Commits & Pull Requests
- − Performance & Reliability
- − When Unsure
- − References To Help Copilot Answer Questions
- − Output Expectations
- − Safety Checklist Before Proposing a CLI Command
- + Internal Go Guidelines
- + Internal Linting
- + Logging, Naming & Status
- + Internal Tests & Fixtures
- + Focused Internal Test Runs
- + FFmpeg Hardware Gating
Commands
1 shared · 23 only in A · 3 only in B- − make help
- − make list
- − make docker-build
- − docker compose up
- − docker compose logs -f --tail=100 photoprism
- − make dep
- − make build-js
- − make build-go
- − make watch-js
- − make test
- − make test-js
- − make vitest-watch
- − make vitest-coverage
- − make test-go
- − make test-short
- − go test ./internal/<pkg> -run '<TestName>' -count=1
- − make fmt-go
- − make fmt-js
- − make lint-js
- − make fmt-go swag-fmt swag
- − go.mod
- − go.sum
- − make notice
- + node
- + go test ./internal/thumb/... -count=1
- + go test ./internal/ffmpeg -run 'Remux|Transcode|Extract' -count=1
- make lint-go
Section tags
2 shared · 7 only in A · 1 only in B- − build
- − lint-format
- − architecture
- − git-pr
- − performance
- − do-not
- − agent-behaviour
- + testing-strategy
- test
- code-style
Line diff
photoprism/photoprism · .github/copilot-instructions.md
@@ −1 @@
1# Instructions for GitHub Copilot
2
3**Last Updated:** July 28, 2026
4
5## Purpose
6
7- Provide Copilot with the single sources of truth for building, testing, and contributing to PhotoPrism.
8- Improve PR reviews and code suggestions by aligning them with our documented workflows and style.
9- Path-specific rules that apply on top of this file live in `.github/instructions/*.instructions.md`.
10
11## Single Sources of Truth (SOT)
12
13- Makefile targets (always prefer existing targets): https://github.com/photoprism/photoprism/blob/develop/Makefile
14- Developer Guide – Setup: https://docs.photoprism.app/developer-guide/setup/
15- Developer Guide – Tests: https://docs.photoprism.app/developer-guide/tests/
16- Contributing: https://github.com/photoprism/photoprism/blob/develop/CONTRIBUTING.md
17- Security: https://github.com/photoprism/photoprism/blob/develop/SECURITY.md
18- REST API (Swagger): https://docs.photoprism.dev/
19- REST API Guide: https://docs.photoprism.app/developer-guide/api/
20- Agents reference for tools/commands: https://github.com/photoprism/photoprism/blob/develop/AGENTS.md
21- Code maps: https://github.com/photoprism/photoprism/blob/develop/CODEMAP.md (backend) and https://github.com/photoprism/photoprism/blob/develop/frontend/CODEMAP.md (frontend)
22- Terminology: https://github.com/photoprism/photoprism/blob/develop/GLOSSARY.md
23
24## Build & Run (local dev; use Makefile first)
25
26- Show common tasks: `make help` (`make list` shows all targets)
27- Build local image: `make docker-build`
28- Start dev env: `docker compose up` (add `-d` for detached, or run `make up`)
29- Logs: `docker compose logs -f --tail=100 photoprism`
30- Open app: http://localhost:2342/ (HTTP) / https://app.localssl.dev/ (TLS via Traefik when enabled)
31- From the dev container:
32 - Install deps: `make dep`
33 - Build frontend: `make build-js` (or `cd frontend && npm run build`)
34 - Build backend: `make build-go`
35 - Watch frontend: `make watch-js` (stop with Ctrl+C)
36 - Run server binary: `./photoprism start`
37
38## Tests & Lint
39
40- Full tests: `make test`
41- Frontend tests (Vitest): `make test-js` (watch: `make vitest-watch`, coverage: `make vitest-coverage`)
42- Backend tests: `make test-go` (slow); `make test-short` for a fast parallel run
43- Targeted Go tests: `go test ./internal/<pkg> -run '<TestName>' -count=1`
44- Formatting and linting:
45 - Go: `make fmt-go` (gofmt + goimports) and `make lint-go` (golangci-lint)
46 - JS/Vue: `make fmt-js` and `make lint-js`. ESLint owns JS and Vue; Prettier owns CSS/SCSS/SASS only. ESLint does not run Prettier, so do not propose reflowing JS to satisfy Prettier.
47- Swagger: after changing API handlers or annotations, run `make fmt-go swag-fmt swag`; never edit `internal/api/swagger.json` by hand.
48- Dependencies: when `go.mod`, `go.sum`, or `package-lock.json` change, regenerate the license reports with `make notice`; never edit `NOTICE` or `frontend/NOTICE` manually.
49
50## Project Structure & Languages
51
52- Backend: Go (`internal/`, `pkg/`, `cmd/`) + MariaDB/SQLite
53- Frontend: Vue 3 + Vuetify 3 (`frontend/`)
54- Docker/compose for dev/CI; Traefik used for local TLS in dev profile when enabled.
55- A maintainer's working copy may contain private subdirectories (`plus/`, `pro/`, `portal/`, `specs/`) that are not part of this repository. Never reference their paths from public artifacts such as pull request descriptions, issue comments, or code comments — external readers only see a broken link.
56
57## Code Review Instructions (for Copilot)
58
59- Respect SOT above; do not invent flags, env vars, or Compose options. If a command/env var is not in the docs/Makefile/CLI help, say "not documented" and suggest checking the SOT.
60- Prefer minimal, surgical diffs. Propose changes as concrete patches and reference the relevant Makefile target or doc section.
61- Before suggesting refactors, check tests and build tasks exist and can pass with the change. If tests are missing, suggest specific Vitest/Go test snippets.
62- Security: never suggest committing secrets; prefer env vars and `.env` in dev only. Point to SECURITY.md for disclosures.
63- Data safety: never run or recommend destructive CLI operations in examples without explicit backups and `--yes`. Avoid `photoprism reset`, `photoprism users reset`, `photoprism auth reset`, or `photoprism audit reset` in PR comments unless the change is specifically about those commands; if unavoidable, add bold warnings and backup steps.
64- Database/schema: if a change touches persistence, check for migrations and mention `photoprism migrate` / `migrations` commands.
65- API changes: align with the REST API docs/spec; include curl examples only if they match current endpoints and auth notes.
66- UX/i18n: keep UI strings concise, translatable, and consistent; avoid hard-coded language constructs; prefer existing patterns/components.
67
68## Style & Patterns
69
70- Go: idiomatic Go, clear error handling, small functions, packages with focused responsibilities. Keep the public surface minimal.
71 - Every added function, including unexported helpers and helpers extracted by a refactor, needs focused coverage in a sibling `*_test.go`.
72 - Code in `pkg/*` must not import from `internal/*`; new code that needs config, entity, or DB access belongs under `internal/`.
73 - Use the permission constants in `pkg/fs` (`fs.ModeDir`, `fs.ModeFile`, `fs.ModeConfigFile`, `fs.ModeSecretFile`) instead of literal file modes.
74 - Doc comments start with the name and stay compact — one line for the "what", plus a line or two only when the "why" cannot be inferred from the code. No issue numbers or change history in comments.
75- Vue/JS: Options API only. Do not introduce TypeScript (no `.ts` files, no `<script lang="ts">`), Composition API, or `<script setup>`.
76 - Shared state lives in reactive singleton modules under `src/common/` and `src/app/`. Do not propose Vuex or Pinia.
77 - Every user-visible string must go through `$gettext`, so it reaches `frontend/src/locales/translations.pot`. Standardized technical identifiers (`Client ID`, `OIDC`, `UUID`) stay literal.
78 - Prefer existing components and model methods over raw `$api` calls in components.
79- Config & flags: suggest `photoprism --help`, `photoprism show config-options` or `photoprism show config-yaml` to verify names before using them.
80
81## Commits & Pull Requests
82
83- Commit subjects use the imperative mood with a one-word scope prefix, for example `Config: Add tests for "darktable-cli" path detection`, and must not exceed 80 characters.
84- Reference related issue or PR IDs in the message when applicable, for example `Docker: Use two stage build to reduce image size #123 #5632`.
85- Do not add AI-authorship trailers such as `Co-Authored-By: Copilot` — this repository uses no commit trailers.
86- Issue titles follow the same prefix style; descriptions open with a bold user story (`**As a <role>, I want <goal>, so that <outcome>.**`) and close with a checklist of acceptance criteria using MUST, SHOULD, or MAY.
87- Commit messages, code comments, and public issue or PR text must not describe exploitable details of a security fix; present such changes as general hardening.
88
89## Performance & Reliability
90
91- Prefer using existing caches, workers, and batching strategies referenced in code and Makefile. Consider memory/CPU impact; suggest benchmarks or profiling only when justified.
92
93## When Unsure
94
95- Ask for the exact Makefile target or doc link you need, then proceed. Defer to SOT if any conflict arises.
96
97## References To Help Copilot Answer Questions
98
99- Show supported formats/filters: run `photoprism show file-formats` and `photoprism show search-filters` (use results rather than guessing).
100- For CI/dev containers, assume a Linux/Unix shell on amd64 or arm64 by default; for Windows specifics, link https://docs.photoprism.app/developer-guide/faq/
101
102## Output Expectations
103
104- Prefer short, actionable comments with code blocks that pass tests locally: `make test-js` (frontend) / `make test-go` (backend)
105- If a suggestion requires additional context (e.g., DB access, external service), call it out explicitly.
106
107## Safety Checklist Before Proposing a CLI Command
108
109- Include a dry-run or non-destructive variant if possible.
110- Recommend creating/using backups before any reset/migrate.
111
photoprism/photoprism · internal/AGENTS.md
@@ +1 @@
1# Internal Go Guidelines
2
3**Last Updated:** April 9, 2026
4
5This file applies to `internal/` and defers subtree-specific rules to the narrower guides under `internal/api/`, `internal/config/`, `internal/commands/`, `internal/photoprism/`, and `internal/service/cluster/`.
6
7## Internal Linting
8
9- Run `make lint-go` after Go changes; for focused work, prefer `golangci-lint run ./internal/<pkg>/...`.
10
11## Logging, Naming & Status
12
13- When adding GORM struct fields with uppercase abbreviations such as `LabelNSFW`, `UserID`, or `URLHash`, set an explicit `gorm:"column:<name>"` tag so column names stay stable.
14- Use the shared logger via the package-level `log` variable backed by `event.Log`; avoid `fmt.Print*` and ad-hoc loggers.
15- In human-readable log text, prefer `instance` and `service`; reserve `node` for contract-bound names such as `/cluster/nodes`, `Node*`, and `PHOTOPRISM_NODE_*`.
16- End every `event.Audit*` slice with exactly one status token from `pkg/log/status`, such as `status.Succeeded`, `status.Failed`, or `status.Denied`.
17- When the outcome should be a sanitized error string, use `status.Error(err)` instead of hand-building it.
18
19## Internal Tests & Fixtures
20
21- Keep Go scratch work inside `internal/...`; Go rejects imports from `internal/` when helpers live under paths such as `/tmp`.
22- Heavy packages such as `internal/entity` and `internal/photoprism` run migrations and fixtures; expect slower first runs and narrow them with `-run`.
23- For database updates, prefer `entity.Values` over raw `map[string]interface{}`.
24- When adding persistent fixtures, generate IDs with `rnd.GenerateUID(...)` and the matching prefix instead of inventing manual strings.
25- Prefer `config.NewMinimalTestConfig(t.TempDir())` for filesystem or config scaffolding and `config.NewMinimalTestConfigWithDb("<name>", t.TempDir())` for isolated SQLite schemas.
26- `internal/config` test helpers now auto-discover the repository `assets/` directory; do not set `PHOTOPRISM_ASSETS_PATH` manually in `init()` unless you truly have a non-standard layout.
27- Hub API traffic is disabled in tests by default via `hub.ApplyTestConfig()`; opt back in with `PHOTOPRISM_TEST_HUB=test`.
28- Avoid `config.TestConfig()` in new tests unless you need the fully seeded singleton fixture set; tests that write to Originals or Import should use isolated minimal configs plus `conf.CreateDirectories()`.
29- `config.NewTestConfig("<pkg>")` defaults to SQLite with a per-suite DSN such as `.<pkg>.db`; do not assert an empty DSN, and clean up captured DSNs with `t.Cleanup(...)` if needed.
30- `NewTestConfig("<pkg>")` already calls `InitializeTestData()`. If you build a custom config, call `c.InitializeTestData()` and optionally `c.AssertTestData(t)` so Originals, Import, cache, and temp exist.
31- `PhotoFixtures.Get()` and similar helpers return value copies; re-query with helpers such as `entity.FindPhoto(...)` when a test needs the persisted row with associations.
32- Reuse shared `Example*` constants for illustrative credentials in tests and docs.
33
34## Focused Internal Test Runs
35
36- Thumbnails: `go test ./internal/thumb/... -count=1`
37- FFmpeg command builders: `go test ./internal/ffmpeg -run 'Remux|Transcode|Extract' -count=1`
38
39## FFmpeg Hardware Gating
40
41- Do not run GPU or hardware encoder integrations in CI by default; gate them with `PHOTOPRISM_FFMPEG_ENCODER` set to `vaapi`, `intel`, or `nvidia`.
42- Keep negative-path ffmpeg tests fast and always runnable: missing ffmpeg should fail immediately, and unwritable destinations should fail without creating files.
43- When hardware is unavailable, prefer command-string assertions; enable full hardware runs locally only when a device is configured.
44
@@ −1 +1 @@
1−# Instructions for GitHub Copilot
1+# Internal Go Guidelines
22
3−**Last Updated:** July 28, 2026
3+**Last Updated:** April 9, 2026
44
5−## Purpose
5+This file applies to `internal/` and defers subtree-specific rules to the narrower guides under `internal/api/`, `internal/config/`, `internal/commands/`, `internal/photoprism/`, and `internal/service/cluster/`.
66
7−- Provide Copilot with the single sources of truth for building, testing, and contributing to PhotoPrism.
8−- Improve PR reviews and code suggestions by aligning them with our documented workflows and style.
9−- Path-specific rules that apply on top of this file live in `.github/instructions/*.instructions.md`.
7+## Internal Linting
108
11−## Single Sources of Truth (SOT)
9+- Run `make lint-go` after Go changes; for focused work, prefer `golangci-lint run ./internal/<pkg>/...`.
1210
13−- Makefile targets (always prefer existing targets): https://github.com/photoprism/photoprism/blob/develop/Makefile
14−- Developer Guide – Setup: https://docs.photoprism.app/developer-guide/setup/
15−- Developer Guide – Tests: https://docs.photoprism.app/developer-guide/tests/
16−- Contributing: https://github.com/photoprism/photoprism/blob/develop/CONTRIBUTING.md
17−- Security: https://github.com/photoprism/photoprism/blob/develop/SECURITY.md
18−- REST API (Swagger): https://docs.photoprism.dev/
19−- REST API Guide: https://docs.photoprism.app/developer-guide/api/
20−- Agents reference for tools/commands: https://github.com/photoprism/photoprism/blob/develop/AGENTS.md
21−- Code maps: https://github.com/photoprism/photoprism/blob/develop/CODEMAP.md (backend) and https://github.com/photoprism/photoprism/blob/develop/frontend/CODEMAP.md (frontend)
22−- Terminology: https://github.com/photoprism/photoprism/blob/develop/GLOSSARY.md
11+## Logging, Naming & Status
2312
24−## Build & Run (local dev; use Makefile first)
13+- When adding GORM struct fields with uppercase abbreviations such as `LabelNSFW`, `UserID`, or `URLHash`, set an explicit `gorm:"column:<name>"` tag so column names stay stable.
14+- Use the shared logger via the package-level `log` variable backed by `event.Log`; avoid `fmt.Print*` and ad-hoc loggers.
15+- In human-readable log text, prefer `instance` and `service`; reserve `node` for contract-bound names such as `/cluster/nodes`, `Node*`, and `PHOTOPRISM_NODE_*`.
16+- End every `event.Audit*` slice with exactly one status token from `pkg/log/status`, such as `status.Succeeded`, `status.Failed`, or `status.Denied`.
17+- When the outcome should be a sanitized error string, use `status.Error(err)` instead of hand-building it.
2518
26−- Show common tasks: `make help` (`make list` shows all targets)
27−- Build local image: `make docker-build`
28−- Start dev env: `docker compose up` (add `-d` for detached, or run `make up`)
29−- Logs: `docker compose logs -f --tail=100 photoprism`
30−- Open app: http://localhost:2342/ (HTTP) / https://app.localssl.dev/ (TLS via Traefik when enabled)
31−- From the dev container:
32− - Install deps: `make dep`
33− - Build frontend: `make build-js` (or `cd frontend && npm run build`)
34− - Build backend: `make build-go`
35− - Watch frontend: `make watch-js` (stop with Ctrl+C)
36− - Run server binary: `./photoprism start`
19+## Internal Tests & Fixtures
3720
38−## Tests & Lint
21+- Keep Go scratch work inside `internal/...`; Go rejects imports from `internal/` when helpers live under paths such as `/tmp`.
22+- Heavy packages such as `internal/entity` and `internal/photoprism` run migrations and fixtures; expect slower first runs and narrow them with `-run`.
23+- For database updates, prefer `entity.Values` over raw `map[string]interface{}`.
24+- When adding persistent fixtures, generate IDs with `rnd.GenerateUID(...)` and the matching prefix instead of inventing manual strings.
25+- Prefer `config.NewMinimalTestConfig(t.TempDir())` for filesystem or config scaffolding and `config.NewMinimalTestConfigWithDb("<name>", t.TempDir())` for isolated SQLite schemas.
26+- `internal/config` test helpers now auto-discover the repository `assets/` directory; do not set `PHOTOPRISM_ASSETS_PATH` manually in `init()` unless you truly have a non-standard layout.
27+- Hub API traffic is disabled in tests by default via `hub.ApplyTestConfig()`; opt back in with `PHOTOPRISM_TEST_HUB=test`.
28+- Avoid `config.TestConfig()` in new tests unless you need the fully seeded singleton fixture set; tests that write to Originals or Import should use isolated minimal configs plus `conf.CreateDirectories()`.
29+- `config.NewTestConfig("<pkg>")` defaults to SQLite with a per-suite DSN such as `.<pkg>.db`; do not assert an empty DSN, and clean up captured DSNs with `t.Cleanup(...)` if needed.
30+- `NewTestConfig("<pkg>")` already calls `InitializeTestData()`. If you build a custom config, call `c.InitializeTestData()` and optionally `c.AssertTestData(t)` so Originals, Import, cache, and temp exist.
31+- `PhotoFixtures.Get()` and similar helpers return value copies; re-query with helpers such as `entity.FindPhoto(...)` when a test needs the persisted row with associations.
32+- Reuse shared `Example*` constants for illustrative credentials in tests and docs.
3933
40−- Full tests: `make test`
41−- Frontend tests (Vitest): `make test-js` (watch: `make vitest-watch`, coverage: `make vitest-coverage`)
42−- Backend tests: `make test-go` (slow); `make test-short` for a fast parallel run
43−- Targeted Go tests: `go test ./internal/<pkg> -run '<TestName>' -count=1`
44−- Formatting and linting:
45− - Go: `make fmt-go` (gofmt + goimports) and `make lint-go` (golangci-lint)
46− - JS/Vue: `make fmt-js` and `make lint-js`. ESLint owns JS and Vue; Prettier owns CSS/SCSS/SASS only. ESLint does not run Prettier, so do not propose reflowing JS to satisfy Prettier.
47−- Swagger: after changing API handlers or annotations, run `make fmt-go swag-fmt swag`; never edit `internal/api/swagger.json` by hand.
48−- Dependencies: when `go.mod`, `go.sum`, or `package-lock.json` change, regenerate the license reports with `make notice`; never edit `NOTICE` or `frontend/NOTICE` manually.
34+## Focused Internal Test Runs
4935
50−## Project Structure & Languages
36+- Thumbnails: `go test ./internal/thumb/... -count=1`
37+- FFmpeg command builders: `go test ./internal/ffmpeg -run 'Remux|Transcode|Extract' -count=1`
5138
52−- Backend: Go (`internal/`, `pkg/`, `cmd/`) + MariaDB/SQLite
53−- Frontend: Vue 3 + Vuetify 3 (`frontend/`)
54−- Docker/compose for dev/CI; Traefik used for local TLS in dev profile when enabled.
55−- A maintainer's working copy may contain private subdirectories (`plus/`, `pro/`, `portal/`, `specs/`) that are not part of this repository. Never reference their paths from public artifacts such as pull request descriptions, issue comments, or code comments — external readers only see a broken link.
39+## FFmpeg Hardware Gating
5640
57−## Code Review Instructions (for Copilot)
58−
59−- Respect SOT above; do not invent flags, env vars, or Compose options. If a command/env var is not in the docs/Makefile/CLI help, say "not documented" and suggest checking the SOT.
60−- Prefer minimal, surgical diffs. Propose changes as concrete patches and reference the relevant Makefile target or doc section.
61−- Before suggesting refactors, check tests and build tasks exist and can pass with the change. If tests are missing, suggest specific Vitest/Go test snippets.
62−- Security: never suggest committing secrets; prefer env vars and `.env` in dev only. Point to SECURITY.md for disclosures.
63−- Data safety: never run or recommend destructive CLI operations in examples without explicit backups and `--yes`. Avoid `photoprism reset`, `photoprism users reset`, `photoprism auth reset`, or `photoprism audit reset` in PR comments unless the change is specifically about those commands; if unavoidable, add bold warnings and backup steps.
64−- Database/schema: if a change touches persistence, check for migrations and mention `photoprism migrate` / `migrations` commands.
65−- API changes: align with the REST API docs/spec; include curl examples only if they match current endpoints and auth notes.
66−- UX/i18n: keep UI strings concise, translatable, and consistent; avoid hard-coded language constructs; prefer existing patterns/components.
67−
68−## Style & Patterns
69−
70−- Go: idiomatic Go, clear error handling, small functions, packages with focused responsibilities. Keep the public surface minimal.
71− - Every added function, including unexported helpers and helpers extracted by a refactor, needs focused coverage in a sibling `*_test.go`.
72− - Code in `pkg/*` must not import from `internal/*`; new code that needs config, entity, or DB access belongs under `internal/`.
73− - Use the permission constants in `pkg/fs` (`fs.ModeDir`, `fs.ModeFile`, `fs.ModeConfigFile`, `fs.ModeSecretFile`) instead of literal file modes.
74− - Doc comments start with the name and stay compact — one line for the "what", plus a line or two only when the "why" cannot be inferred from the code. No issue numbers or change history in comments.
75−- Vue/JS: Options API only. Do not introduce TypeScript (no `.ts` files, no `<script lang="ts">`), Composition API, or `<script setup>`.
76− - Shared state lives in reactive singleton modules under `src/common/` and `src/app/`. Do not propose Vuex or Pinia.
77− - Every user-visible string must go through `$gettext`, so it reaches `frontend/src/locales/translations.pot`. Standardized technical identifiers (`Client ID`, `OIDC`, `UUID`) stay literal.
78− - Prefer existing components and model methods over raw `$api` calls in components.
79−- Config & flags: suggest `photoprism --help`, `photoprism show config-options` or `photoprism show config-yaml` to verify names before using them.
80−
81−## Commits & Pull Requests
82−
83−- Commit subjects use the imperative mood with a one-word scope prefix, for example `Config: Add tests for "darktable-cli" path detection`, and must not exceed 80 characters.
84−- Reference related issue or PR IDs in the message when applicable, for example `Docker: Use two stage build to reduce image size #123 #5632`.
85−- Do not add AI-authorship trailers such as `Co-Authored-By: Copilot` — this repository uses no commit trailers.
86−- Issue titles follow the same prefix style; descriptions open with a bold user story (`**As a <role>, I want <goal>, so that <outcome>.**`) and close with a checklist of acceptance criteria using MUST, SHOULD, or MAY.
87−- Commit messages, code comments, and public issue or PR text must not describe exploitable details of a security fix; present such changes as general hardening.
88−
89−## Performance & Reliability
90−
91−- Prefer using existing caches, workers, and batching strategies referenced in code and Makefile. Consider memory/CPU impact; suggest benchmarks or profiling only when justified.
92−
93−## When Unsure
94−
95−- Ask for the exact Makefile target or doc link you need, then proceed. Defer to SOT if any conflict arises.
96−
97−## References To Help Copilot Answer Questions
98−
99−- Show supported formats/filters: run `photoprism show file-formats` and `photoprism show search-filters` (use results rather than guessing).
100−- For CI/dev containers, assume a Linux/Unix shell on amd64 or arm64 by default; for Windows specifics, link https://docs.photoprism.app/developer-guide/faq/
101−
102−## Output Expectations
103−
104−- Prefer short, actionable comments with code blocks that pass tests locally: `make test-js` (frontend) / `make test-go` (backend)
105−- If a suggestion requires additional context (e.g., DB access, external service), call it out explicitly.
106−
107−## Safety Checklist Before Proposing a CLI Command
108−
109−- Include a dry-run or non-destructive variant if possible.
110−- Recommend creating/using backups before any reset/migrate.
41+- Do not run GPU or hardware encoder integrations in CI by default; gate them with `PHOTOPRISM_FFMPEG_ENCODER` set to `vaapi`, `intel`, or `nvidia`.
42+- Keep negative-path ffmpeg tests fast and always runnable: missing ffmpeg should fail immediately, and unwritable destinations should fail without creating files.
43+- When hardware is unavailable, prefer command-string assertions; enable full hardware runs locally only when a device is configured.
11144
