[nikhilbirmiwal-pplx]

Summary

Add node_runtime_installations.requires_environment BOOLEAN NOT NULL DEFAULT FALSE as the schema-only prerequisite for #1569. The application PR publishes managed-only installation provenance and prevents those installations from authorizing unbound Direct creates.

This PR contains only the paired forward/rollback SQL migrations. The false default preserves the interpretation of existing legacy installation rows.

Validation

• Applied and rolled back the migration transactionally against local PostgreSQL and verified the false default for legacy inserts.
• scripts/check-postgres-migrations-isolated.sh: passed with only the paired SQL migrations in the PR diff.
• scripts/check-migration-versions.sh: passed all migration directories.
• scripts/check-postgres-migrations-squawk.sh: passed with zero SQL issues.
• Staged diff whitespace checks and the pre-commit secret scan passed.
• No production migration or live-cluster rollout was performed.

Severity and risk

Severity: prerequisite for an availability fix in #1569. Managed-only runtime inventory must not be treated as unbound create capacity.

Risk: low additive-schema risk, with an exclusive table lock bounded by a one-second lock timeout and a five-second statement timeout. The constant false default avoids changing legacy interpretation.

Rollout

Merge and deploy this migration before the application readers in #1569. Then deploy inventory consumers/forwarders and Direct placement readers before enabling the managed-only inventory producer.

For rollback, roll back producers and wait for a complete legacy-only inventory refresh, or drain affected nodes, before rolling back readers. Drop the column only after all binaries referencing it have been rolled back.

AI assistance: Perplexity Computer authored the migration split and this description while addressing review feedback on #1569.

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Commit: 797f992087fd.

Walkthrough

The forward migration adds requires_environment to node_runtime_installations as a non-null Boolean with a default of FALSE. It documents the column’s environment-binding and placement eligibility requirements. The rollback migration drops the column. Both migrations set local lock and statement timeouts.

Possibly related PRs

• perplexityai/SPACE#1569: Uses requires_environment when publishing managed-only installations and filtering unbound Direct placement.

Merge Risk: Moderate · up to 797f9

The migration adds a default-false flag, but its default and rollback lack automated regression checks. Validate these before merging.

Architecture risk: Low · up to 797f9

The change affects 1 system.

Changed systems: db

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — db (service) was modified; 2 changed files map to changed impact.

Before / after behavior

• observed — Modified behavior in db/postgres/20261105215935_runtime_binding_requirement.down.sql: The migration sets local lock and statement timeouts to 1 second and 5 seconds, then drops the requires_environment column from node_runtime_installations.
• observed — Modified behavior in db/postgres/20261105215935_runtime_binding_requirement.up.sql: The migration sets local lock and statement timeouts to 1 second and 5 seconds, adds node_runtime_installations.requires_environment as a non-nullable Boolean defaulting to FALSE, and adds a comment describing its environment-binding requirement and placement eligibility.

Pre-merge checks: 5

Check name	Status	Explanation
Description Follows The Pr Template		The description includes a summary, validation results, severity and risk, and an AI assistance line naming the tool and its contributions.
Bug Fixes Name A Regression Test		The PR adds a schema prerequisite only. It does not fix application behavior under crates/, shim/, or ui/, so the check does not apply.
Weakened Safeguards Are Justified		The diff adds two SQL migration files. It does not weaken a test, assertion, lint, CI check, or repository guard.
Public-Safe Content		The diff, title, and description contain no identified public-safety material covered by the check.
Title check		The title starts with the lowercase area db:, followed by a lowercase summary. It accurately describes the added database tracking column and has no trailing period, ticket ID, or internal link.

Recent review info

Automatic approval policy

Commit: 797f992087fd.

Setting	Effective value	Source
Automatic approvals	Disabled	Override 4
Merge risk	Low	Override 2
Security risk	Not set	Global configuration

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• Override 2 — any author; paths: **, !ui/**; merge risk: Low.
• Override 4 — any author; paths: .coderabbit.yaml, .coderabbit.yml, coderabbit.yaml, coderabbit.yml, .coderabbit.config.ts, **/AGENTS.md, **/CLAUDE.md, .agents/**, .claude/**, .claude-plugin/**, CONTRIBUTING.md, docs/versioning.md, docs/rust/space-conventions.md, docs/rust/space-review-lessons.md, .github/**, ci/**, !ci/scripts/setup-nextest-*.sh, scripts/source_guards/**, scripts/check*, clippy.toml, deny.toml, .gitleaks.toml, .pre-commit-config.yaml, lefthook.yaml, rust-toolchain.toml, .cargo/**, supply-chain/**, pyproject.toml, uv.lock, **/package.json, **/package-lock.json, **/go.mod, **/go.sum, **/requirements*.txt, **/requirements*.in, proto/**, db/**, crates/l40_api/api/src/auth.rs, crates/l40_api/api/src/auth/**, crates/l40_api/api/src/middleware/auth*, crates/l40_api/api/src/middleware/auth/**, crates/l40_api/api/src/routes/authz.rs, crates/l10_foundation/bearer/**, crates/l10_foundation/rustls/**, crates/l10_foundation/guest/**, crates/l10_foundation/pii/**, shim/**, docker/**, !docker/Dockerfile.rust-build-kind, templates/**, infra/space/aws/**, infra/space/cluster/**, infra/space/identity/**, infra/space/observability/**, infra/space/packer/**, infra/space/kind/charts/**, LICENSE, SECURITY.md; automatic approvals: disabled.

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[coderabbitai]

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Failed pre-merge checks:
- Title check:
Change the title to `db: track environment-bound runtime installations`.

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Review info

Run configuration

• Source mode: Auto
• Repository: perplexityai/SPACE
• Branch: schema/runtime-binding-requirement
• File: .coderabbit.yaml
• Commit: 797f992
• Layers: Repository YAML; Enforced overrides: Organization
• Review profile: CHILL
• Plan: Enterprise
• Run ID: 34fb8a95-723d-4e41-8112-f15fc0053d98

Commits

Reviewing files that changed from the base of the PR and between f1f2405 and 797f992.

Files selected for processing: 2

• db/postgres/20261105215935_runtime_binding_requirement.down.sql
• db/postgres/20261105215935_runtime_binding_requirement.up.sql

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