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feat: add support for Nix via a flake

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#991 Docs: add --concurrency flag and SLOTS column to worker-commands reference

Opened by stack72 · 7/6/2026· Shipped 7/6/2026

Summary

Phase 4b (#989) added capacity slots (--concurrency N|auto) and least-loaded scheduling. The worker-commands reference page needs updates.

Change needed

`content/manual/reference/remote-execution/worker-commands.md`

`swamp worker connect` section — add flag to the flags table:

Flag	Required	Description	Default
`--concurrency `	No	Number of concurrent dispatch slots (`auto` = CPU count, min 1). A capacity-4 worker runs up to 4 steps simultaneously, each in its own isolated child process. (env: `SWAMP_WORKER_CONCURRENCY`)	`1`

Add env var:

Variable	Flag
`SWAMP_WORKER_CONCURRENCY`	`--concurrency`

Add example: ```bash

Big node: 8 concurrent dispatch slots

swamp worker connect wss://orch:9090 --token --concurrency 8

Auto-detect from CPU count

swamp worker connect wss://orch:9090 --token --concurrency auto ```

`swamp worker list` section — note that the output now includes a SLOTS column showing current load (e.g., `0/4`, `3/8`). JSON output includes `capacity` (number) and `activeDispatchIds` (array).

Files verified as needing NO changes

`reference/swamp-serve/serve-flags.md` — capacity is worker-side
`reference/remote-execution/enrollment-tokens.md` — no token changes
`reference/remote-execution/failure-semantics.md` — no failure behavior changes
`reference/remote-execution/security.md` — per-dispatch credential scoping is internal

Context

Ship alongside or shortly after #989 merges.

02Bog Flow

Shipped

7/6/2026, 7:15:10 PM

Click a lifecycle step above to view its details.

03Sludge Pulse

stack72 assigned stack727/6/2026, 6:52:37 PM

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Beta-channel extensions are never scored — perpetual 'Scoring is taking longer than expected'

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command/shell: step with timeout + a surviving child process reports exit -1 despite command exiting 0

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Automate mechanical frontmatter fixes in the fixing stage