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ThothII/.superpowers/sdd/task-5-report.md
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# Task 5 report — backend principal enforcement
## RED
Added backend route/auth tests before implementation. The initial focused run failed in
seven new assertions: `getPrincipal` did not exist, upstream requests still required the
legacy identity header, foreign session/SSE routes were not hidden, admin scope was not
enforced, new sessions had no trusted principal binding, and settings were global.
## GREEN
- Focused backend suite: `66 passed` across auth, sessions, SSE, and settings tests.
- Complete backend Vitest suite: `209 passed` across `22` files.
- `npx tsc --noEmit -p .`, `npm run build`, `git diff --check`, and changed Python
source Ruff all exit successfully.
- Harness targeted repository/local/migration tests and Python bytecode compilation exit
successfully. The new `tht session preferences get|set` commands are registered and
expose the expected Typer help. A direct local CLI preference smoke was not run because
the checked-in local workspace requires unavailable `THT_DB_HOST` configuration.
## Route and child-process coverage
- `GET /me` returns the request `PrincipalContext`; upstream accepts only the portal's
normalized `X-Thoth-*` identity tuple, with the legacy header ignored. Local mode uses
the same stable `THT_HOME`/`~/.thothii/identity.json` UUID contract as the harness.
- All session operations are principal-scoped: list (`mine` and admin-only `all`), show,
create, resume, close, delete, rename, group, archive, unarchive, documents, reviewer
response, steer, SQL preview/export, and SSE. Missing and foreign sessions are 404;
absent upstream identity is 401. SSE is authorized before response headers or hub
subscription, so a rejected request cannot attach to a live stream.
- New/resumed Pi runtimes and every route-spawned `tht` process receive
`THT_PRINCIPAL_ISSUER`, `THT_PRINCIPAL_SUBJECT`, optional display name, and admin flag.
The readiness `tht` child is also principal-bound.
- Settings use asynchronous repository-backed `tht session preferences get|set` in the
production runner, which isolates preferences by principal. The legacy settings file is
retained only as an injected-runner compatibility fallback for existing isolated tests.
- Repository/settings authorization failures map to 503 before model startup. SQL execution
errors remain 500 after authorization, preserving the prior API distinction.
## Self-review and concerns
- Confirmed the Task 4 portal emits lowercase `true`/`false` for the admin header; the
parser accepts that exact normalized form plus the repository's existing `1`/`0`
compatibility form, and rejects all other values.
- The harness principal resolver is the ownership authority; the backend never accepts an
owner supplied in request bodies. Its route guards use a repository-scoped `session show`
before every session resource operation.
- Existing dependency-injected route fakes without `sessionShow` retain a narrow test seam;
production `ThtRunner` always has that method, so deployed requests cannot bypass the
repository authorization check.
## Review follow-up
### RED
Focused regressions initially failed exactly at the three review findings: stale ambient
display names survived into both `tht` and Pi child environments; mutation/document runner
methods dropped the selected workspace; and `expandLocalHome` did not exist.
### GREEN
- Child environments now remove all four `THT_PRINCIPAL_*` keys from their cloned base
environment before applying the exact request principal. Regression tests prove an absent
display name does not inherit a stale ambient value in either child path.
- `setName`, `setGroup`, `archive`, `unarchive`, and `documents` now take and retain an
optional workspace. The rename route regression proves `session show` authorization and
the mutation use the same non-default workspace.
- Local principal paths expand `~`/`~/...`; existing local home and identity file modes are
repaired to POSIX `0700`/`0600` when applicable, with Windows left unchanged.
- Focused suite: `74 passed`; full backend suite: `213 passed` across `22` files, followed by
TypeScript typecheck, production build, and diff check.