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browser/platform/protocol/server-deployment.md
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# Server deployment plan v1
`deployment.plan.v1` is the capability gate for Run implementations that can
execute a protected server deployment plan. Platform only sends the plan in a
leased `RunJobAssignmentResponse.executionInput.deployment`; it never appears
in public server, job, audit, log, or plugin-bridge responses.
SCUM controlled deployments additionally require `deployment.scum.v1`. The
leased assignment includes `executionInput.serverDeploymentPlan` with
`schemaVersion: "1"`, an operation of `install` or `adopt`, the frozen template
key/version, Steam app id, logical executable/config references, explicit field
mappings, discovery markers, and required verification checks. The plan is
secret-free and contains logical keys only; the protected deployment body still
holds the operator's paths/commands and is resolved only by Run.
## Capability and policy
Run advertises `deployment.plan.v1` along with its normal lifecycle
capabilities. A Run that supports shell commands additionally advertises its
local policy for `posix-sh`, `powershell`, or `cmd` out of band with its
operator configuration. Platform must not infer shell support from command
text. Empty `shell` means argv-oriented execution.
## Required local preflight
Before a write, install, or process action, Run validates the selected plan:
- absolute server root and working directory are allowed anywhere permitted by
the local Run policy; they are not required to be adjacent to the Run binary;
- the effective directory, executable, permissions, timeout, plugin version,
and requested ports are locally valid;
- selected shell kind and custom-command policy are enabled;
- no raw command, path, secret, socket address, or credential is emitted in a
result, diagnostic, log batch, or artifact name.
For an SCUM `install`, Run performs SteamCMD app installation followed by
configuration materialization and health checks. For `adopt`, Run performs a
scan first and must not reinstall or overwrite existing configuration. A
controlled SCUM install or adoption requires an explicit protected server root;
the root is never exposed in browser projections. Adoption does not require
new-install create inputs because its mapping phase is read-only unless a
separate approved write is dispatched. A
terminal SCUM result must include bounded `serverDeploymentEvidence` with
preflight, discovery, mapping, and verification states. Required mapping
results are `applied` or `unchanged`; required verification results are
`passed` (adoption may report mapping as `skipped`). Failed results include a stable `failureCode` and never include the
resolved path or command text. Successful result kinds are
`scum.install.completed` and `scum.adopt.completed`; failed result kinds are
`scum.install.failed` and `scum.adopt.failed`.
An `existing-server` plan may omit installation. A `custom-command` plan
requires a start command. Guided templates remain plugin recommendations;
Run owns their local resolution and execution.
## Safe progress reports
Run reports bounded progress with `percent`, `phase`, and a safe message. The
allowed phase vocabulary is `queued`, `claimed`, `preflight`, `scan`, `install`,
`configure`, `mapping`, `start`, and `health`. On failure it reports a stable safe error
code and summary such as `working-directory-unavailable`, never the supplied
path or command text.
Platform treats preflight as authoritative. It does not open a direct shell,
SSH connection, raw socket, or host filesystem to compensate for a failed
preflight.