Replace nix hash tasks with Evergreen FOD refresh

[schickling-assistant]

Problem
The shared nix-cli devenv module still exposes bespoke nix:hash tasks for refreshing fixed-output dependency hashes. Evergreen is now the preferred FOD refresh path, so keeping both surfaces makes the long-term workflow harder to standardize.

Goal
Replace the legacy hash-refresh task surface with evergreen:fod:refresh tasks while keeping nix:check, nix:check:quick, and nix:build validation intact.

Decisions

• Removed the custom iterative hash updater instead of keeping a compatibility shim.
• The generated devenv task invokes Evergreen with the package's declared flakeRef and hashSource, so non-standard consumers do not depend on discovery heuristics.
• Default refresh scope is the current system; broader cross-system refreshes remain available through direct Evergreen commands.

Verification

• nix-instantiate --parse nix/devenv-modules/tasks/shared/nix-cli.nix
• bash nix/devenv-modules/tasks/shared/tests/nix-cli-evergreen.test.sh
• CI=1 devenv tasks run check:all --mode before --no-tui --show-output

Complexity
Removes the bespoke updater and replaces it with a thin Evergreen wrapper.

Concerns
Repos must provide the Evergreen CLI on PATH for the new refresh task. Validation-only Nix tasks are unchanged.

Friction & bottlenecks
The first local check run can hit an existing task-ordering issue where mr:apply starts before the workspace relink; rerunning after pnpm:install is primed passes.

Follow-ups
After downstream consumers merge this stack, point temporary branch pins back at default upstream refs.

References
Stack parent for downstream consumer adoption.

Posted on behalf of @schickling

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agent_name	🌄 co1-vale
agent_session_id	ee2f8a7b-5623-4ad7-a682-0dbe5737d042
agent_tool	Codex CLI
agent_tool_version	0.125.0
agent_runtime	Codex CLI 0.125.0
agent_model	unknown
worktree	effect-utils/schickling/2026-05-08-evergreen-nix-hash
machine	dev3
tooling_profile	dotfiles@unknown-dirty

[github-actions]

Storybook Previews

Package	Latest URL	Last Deploy (Europe/Berlin)
megarepo	https://megarepo-pr-645--overeng-utils.netlify.app	2026-05-08 14:03 CEST
tui-react	https://tui-react-pr-645--overeng-utils.netlify.app	2026-05-08 14:03 CEST
notion-react	https://notion-react-pr-645--overeng-utils.netlify.app	2026-05-08 14:03 CEST
effect-react	https://effect-react-pr-645--overeng-utils.netlify.app	2026-05-08 14:03 CEST
tui-stories	https://tui-stories-pr-645--overeng-utils.netlify.app	2026-05-08 14:03 CEST
notion-cli	https://notion-cli-pr-645--overeng-utils.netlify.app	2026-05-08 14:03 CEST
effect-schema-form-aria	https://effect-schema-form-aria-pr-645--overeng-utils.netlify.app	2026-05-08 14:03 CEST
genie	https://genie-pr-645--overeng-utils.netlify.app	2026-05-08 14:03 CEST
react-inspector	https://react-inspector-pr-645--overeng-utils.netlify.app	2026-05-08 14:04 CEST

Per-Commit Deploy History

Commit 38742a4 · 2026-05-08 14:05 CEST

Package	URL
megarepo	https://69fdd0f4f52b576afdb56f9b--overeng-utils.netlify.app Alias: https://megarepo-pr-645--overeng-utils.netlify.app
tui-react	https://69fdd0f9f8743e68b8075381--overeng-utils.netlify.app Alias: https://tui-react-pr-645--overeng-utils.netlify.app
notion-react	https://69fdd0f9ba6cc56a51f48840--overeng-utils.netlify.app Alias: https://notion-react-pr-645--overeng-utils.netlify.app
effect-react	https://69fdd0ff61662f738a13b489--overeng-utils.netlify.app Alias: https://effect-react-pr-645--overeng-utils.netlify.app
tui-stories	https://69fdd1046c3eef51dda7f61d--overeng-utils.netlify.app Alias: https://tui-stories-pr-645--overeng-utils.netlify.app
notion-cli	https://69fdd107f8743e6af80752d9--overeng-utils.netlify.app Alias: https://notion-cli-pr-645--overeng-utils.netlify.app
effect-schema-form-aria	https://69fdd1077450d46e90000ef4--overeng-utils.netlify.app Alias: https://effect-schema-form-aria-pr-645--overeng-utils.netlify.app
genie	https://69fdd108ced40059e8b7ccb0--overeng-utils.netlify.app Alias: https://genie-pr-645--overeng-utils.netlify.app
react-inspector	https://69fdd1476a29d06a8ae08351--overeng-utils.netlify.app Alias: https://react-inspector-pr-645--overeng-utils.netlify.app

[schickling-assistant]

Superseded by #646 with a neutral public branch and PR surface.

Posted on behalf of @schickling

field	value
agent_name	🌄 co1-vale
agent_session_id	ee2f8a7b-5623-4ad7-a682-0dbe5737d042
agent_tool	Codex CLI
agent_tool_version	0.125.0
agent_runtime	Codex CLI 0.125.0
agent_model	unknown
worktree	effect-utils/schickling/2026-05-08-evergreen-nix-hash
machine	dev3
tooling_profile	dotfiles@unknown-dirty