`EnvCredentialSource` resolved provider credentials from the process
environment. It had no production entry point of its own — it was only
ever reached as the `None` arm of an `Option<Vault>` in three places:
`build_llm_source`, `configured_providers_for_start`, and
`configured_providers_from_process_env`.
That optional vault is not a state the product can be in. Every run has a
server behind it, the server always spawns workers with `--storage-dir`
(`worker_runtime.rs`), and `SqlVaultCredentialSource` backs both the
server and the CLI. So the fallback only served to silently degrade
credential resolution to whatever the worker process happened to have in
its environment.
Make the vault required across the run path — `RunOptions`,
`StartServices`, `build_llm_source`, `tool_secrets_from_configured_sources`,
`vault_token_lookup`, and the CLI GitHub helpers — so the invariant is
enforced by types rather than assumed. A worker spawned without
`--storage-dir` now fails with a clear message instead of quietly
continuing without a vault.
`configured_providers_from_process_env` had no callers at all and is
deleted. `AgentApiBackend::new_from_env` was public but only ever called
from its own tests; it is deleted too.
Test-only credential sources move to a feature-gated
`fabro_auth::test_support`, wired through dev-dependencies so they never
link into production builds. The CLI worker tests now pass
`--storage-dir`, matching what the server actually does.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Diagnostics have carried a `fix` field all along, but the CLI renderer
never printed it — the suggestion was only reachable through --json. The
actionable half of every validation failure was invisible to the person
running the command.
print_diagnostics now emits the fix as a dim-labelled continuation line
under any diagnostic that has one, at both error and warning severity.
Gating it behind --verbose would defeat the point, and printing it only
for errors would read as "this warning has no fix" — the warning
suggestions are useful on their own. Diagnostics that set no fix simply
omit the line.
The severity match moved into print_diagnostic so the fix line is
appended once in the loop rather than copied into all five arms; the
rest of the diff is reindentation.
print_diagnostics is shared by validate, preflight, graph, exec, and
dry-run, so this covers all five. Eleven inline snapshots across four
files gain a fix line; every change is additive.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
