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fix(plane): fetch task-produced inputs from the receiver after the start

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A producer's artifact rendered as spec.files of a generated <task>-inputs
Workspace ends up in ax's AX_WORKSPACES_YAML env value; Agent Substrate
rejects values over 32768 characters, so a 182 KB facts.json broke ax apply
on the live cluster. The reconciler now passes OUSAST_INPUTS instead, the
receiver serves a running task its declared inputs over GET /inputs/..., and
the runner fetches them after the start (failed fetch -> failed summary).

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01EmM1j46qgKMh3zqD1QMwEo
This commit is contained in:
Marius Ciepluch
2026-09-29 21:35:28 +02:00
co-authored by Claude Opus 5.5
parent 554f00e2f7
commit 89d000c704
8 changed files with 352 additions and 57 deletions
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.kiro/specs/ai-service-plane/design.md
+6 -1
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@@ -56,7 +56,12 @@ container the same module is PID 1 (`ax-task-runner`), built as a target of the
for tasks that must not overlap; engine-bearing tasks carry `engine`). The reconciler passes budgets and
artifact paths to a task as `env` entries (`OUSAST_BUDGET_USD`, `OUSAST_BUDGET_CALLS`, `OUSAST_INPUT_<NAME>`,
`OUSAST_OUTPUT_DIR`), which is ax's own mechanism for task configuration, so a Run never adds a field to a
Task.
Task. Inputs another task produced are never rendered into a Workspace (ax puts every bound Workspace into one
env value, `AX_WORKSPACES_YAML`, and Agent Substrate rejects values over 32768 characters): the Task carries
`OUSAST_INPUTS` = `{"<NAME>": "<producer>/<artifact>"}`, and after the start request the runner fetches each
from the receiver's `GET /inputs/<producer>/<artifact>` (same headers, dial and retries as delivery; only a
running task's declared inputs are served) to its `OUSAST_INPUT_<NAME>` path; a failed fetch delivers a
failed summary naming the input and the command never runs.
### Runner (`runner.py`)
.kiro/specs/ai-service-plane/tasks.md
+3
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@@ -76,6 +76,9 @@ mypy are clean, and the commit is gated on pytest's own exit code. Script-level
`ate-target-actor: <atespace>/<task>`; 502/503/504 and connection errors retried up to
`OUSAST_START_TIMEOUT`, a 409 final), carrying the bound Model's `secretKey.key` variable from the
reconciler's environment; a Model-bound task whose variable is unset fails before `ax apply`.
Task-produced inputs travel as `OUSAST_INPUTS`, not as a rendered Workspace: the runner fetches them after
the start from the receiver's authorised `GET /inputs/<producer>/<artifact>` (a 182 KB `facts.json` in
`AX_WORKSPACES_YAML` exceeded Substrate's 32768-character env limit on the live cluster, 2026-09-29).
- `ousast plane run <Run.yaml>`, `ousast plane status <run>` (token attribution table per task and Model
from the tasks' `summary.json` usage; `--units` from `units.jsonl`; also written to `attribution.json`),
`ousast plane workspaces <population.toml>` (generates Workspace manifests per case pin).