fix(agents): prompt for unified config env values

[glharper]

Summary

• prompt for unset bare ${VAR} references in adopted Foundry service configuration during azd ai agent init
• persist prompted values to the active azd environment and mask credential-like inputs
• preserve existing values, ${VAR:-default}, Foundry ${{...}}, hook variables, and --no-prompt behavior

Testing

• go test ./... -count=1
• go build ./...
• golangci-lint run ./internal/cmd/...

Fixes #9110

[github-actions]

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[Copilot]

Pull request overview

Adds prompting and persistence for missing environment references in adopted Foundry configurations.

Changes:

• Detects bare ${VAR} references while excluding defaults, hooks, and escaped references.
• Masks credential-like prompts and saves responses to the active environment.
• Integrates the flow into unified azure.yaml adoption with tests.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
init_env.go	Implements reference discovery, prompting, and persistence.
init_env_test.go	Tests detection, masking, persistence, and no-prompt behavior.
init_adopt.go	Invokes environment configuration during adoption.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

[jongio]

Traced the `` resolution through foundry.ResolveFileRefs (sibling keys overlay the loaded object) and confirmed the `${{...}}` masking is multiline-aware before the env-ref regex runs. Escape handling, `:-` default skipping, hooks exclusion, and secret-upgrade dedup all line up with the tests. Nothing blocking from me.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

[jongio]

init_env.go:78 - the missing-value check reads from GetValues, which returns only persisted dotenv entries. Foundry expansion resolves unset refs from the process environment as well (synthesis/synthesizer.go maybeExpand falls back to os.LookupEnv). A var that is exported in the shell but absent from the azd env is treated as missing here, so we prompt for it and then persist a value that shadows the exported one. Mirroring the same dotenv-first, process-env fallback lookup (while still counting an explicitly empty dotenv entry as missing) avoids the spurious prompt. A process-env-only regression test would lock it in.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (2)

cli/azd/extensions/azure.ai.agents/internal/cmd/init_env.go:515

• [azd-code-reviewer] This blanket skip assumes every supported provider expands :- defaults. The project-network resolver only matches bare ${VAR} references (azure.ai.projects/internal/synthesis/synthesizer.go:685-686), so ${VNET_ID:-...} or ${DNS_SUBSCRIPTION_ID:-...} remains literal and then fails ID/GUID validation. Route project network fields through the shared Foundry expander (including the legacy provider) before treating these references as self-sufficient.

		if match[4] != -1 {
			continue
		}

cli/azd/extensions/azure.ai.agents/internal/cmd/init_env_test.go:381

• [azd-code-reviewer] The behavior under test depends on these Playwright variables being absent from the process environment. A developer who has either value exported will skip that prompt and fail the assertions. Set both names to an empty value before configuring the project so this test is deterministic.

	projectDir := t.TempDir()

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.

[jongio]

Verified the escape alignment in e0639ba against both expanders.

Project and Foundry network fields (agentSubnet.vnet, peSubnet.vnet, dns.subscription) are expanded by resolveVars, which runs a bare ${VAR} regex with no escape handling. Same function in both synthesizers that own those hosts: azure.ai.projects/internal/synthesis/synthesizer.go:895 (reached from resolveSubnet at :854 and the dns.subscription branch at :801) and the azure.ai.agents copy at the same lines for the legacy microsoft.foundry host. So honorEscaping=false there is the right match: discovery now prompts for $${VNET_ID} because resolveVars is going to substitute it either way.

Everything else routes through foundry.ExpandEnv (drone/envsubst), which does honor the escape: agent environmentVariables via project.ExpandEnv (service_target_agent.go:2620), connection target/credentials/metadata via maybeExpand and expandCredentials (synthesizer.go:571, :588), routine action.input (routines service_target.go:214), toolbox endpoint/tools (toolboxes service_target.go:248, :352). I ran the expander directly to pin the parity rule: $${VAR} gives a literal ${VAR}, $$${VAR} gives $ plus the expanded value. honorEscaping=true on those paths lines up.

Also checked the test isolation in 9b75e58. t.Setenv(name, "") clears these correctly because the process fallback at init_env.go:160 requires ok && value != "", so a present-but-empty var still lands in missing. I ran the prompt tests with PLAYWRIGHT_SERVICE_ACCESS_TOKEN, PLAYWRIGHT_SERVICE_RESOURCE_ID, REFERENCED_API_TOKEN and ROOT_RESOURCE_ID exported to non-empty values and they pass. The two tests in that file still on t.Parallel() don't reach the fallback: NoPromptSkipsPrompts returns at init_env.go:120 before discovery runs, and SkipsConfiguredValues has the value in the azd env so it short-circuits at :153.

Build, vet, and the internal/cmd suite pass at 9b75e58. Two non-blocking notes inline.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.

[jongio]

One thing to settle before merge: discovery never scans services.<name>.env, which is exactly where #9079 moves agent env. That's the concrete answer to @trangevi's question about conflict with that PR. Details inline.

[jongio]

Two things, neither blocking.

Medium: --no-prompt returns before discovery runs, so process-env values never get persisted in automation, and the three hosts that read only the persisted azd environment will expand them to empty at deploy. init_env.go:129

Low: the ${{...}} span regex is duplicated from pkg/foundry instead of shared, which is the drift class this PR has been chasing. init_env.go:26

Separately, on how the field list was decided: I traced it against production and it matches. Agent environmentVariables[*].value, connection target/credentials/metadata, and toolbox/routine values all route through foundry.ExpandEnv, while project network.*.vnet and network.dns.subscription go through resolveVars. That split is exactly why the two escape modes exist.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.