[Harshith Arun Kumar (harshith-arunkumar)]

Summary

Synchronize the maintained fine-tuning sessions SDK from Loom master 26869a447bd03527712ac1c390a96d13e8ad235d and prepare azure-ai-finetuningsessions 1.0.0b2.

Specification companion: Azure/azure-rest-api-specs#47795

Generation pins the full public spec commit 0a86307b307665b6a0b9b12ebc42248c2b262325.

• Port text-only public messages/function calls, opaque-reference training, safe invalid-completion results, and scalar-only training results.
• Port checkpoint destination validation, preparation polling, and manifest validation. These methods do not create local directories, transfer weights, or enable service access.
• Port trainer interruption/CFT guidance, bounded sampling retries, polling and heartbeat fixes, and async session attachment.
• Regenerate with the repository's shared Python emitter 0.63.10, Python generator 0.39.0, compiler 1.17.0, and exact shared lockfile.
• Preserve token-native constructors and list-based stop criteria through Python TypeSpec projections. Maintained forward/sampling compatibility routes remain unchanged; generated native operations use canonical routes.
• Scope direct context to known canonical native routes and existing supported calls, preserving origin/resource boundaries and excluding file locators, unknown routes, and lookalike prefixes.
• Preserve Loom's scalar fast path through the supported models.patch_sdk hook rather than hand-editing generated model utilities. Remove this temporary optimization once the upstream shared generator passes the committed scalar/tensor probe tests.
• Refresh the APIView snapshot, source/toolchain/runtime provenance, maintenance probes, README, and beta changelog. Keep the immutable earlier comparison baseline separate from the current sync reference.

Validation

• Both TypeSpec entrypoints compile, including a strict warning-free Python projection and the complete Foundry REST service.
• 21 generated entries and the complete 32-file runtime match two independent fresh emissions. Maintained modules are seeded before generation; no generated-source rewriting is used.
• Python 3.10.21 / minimum Azure Core 1.37.0: 2,497 passed, 73 skipped.
• Python 3.13.14: 2,498 passed, 72 skipped.
• Installed beta wheel on minimum runtime/dependencies: 2,497 passed, 73 skipped, with import origin verified.
• Every wheel runtime file matches source after CRLF normalization; CRC is valid and nested build/test/temporary artifacts are excluded.
• Existing maintainer-tool regressions: 16 passed, including TypedDict requiredness, public aliases, and overload fallback.
• Exact repository MyPy 1.19.1 and next-version MyPy 2.1: no issues in 33 source files.
• Pyright: zero errors and warnings.
• Repository-pinned pylint 4.0.4 / SDK guidelines checker 0.5.7: clean, 10.00/10.
• Authentication-related changes and the canonical-context follow-up received security review: no vulnerabilities found.

Windows symlink cases are skipped where privileges are unavailable; sync-only/pipelined combinations are intentionally excluded, and eager-task coverage requires Python 3.12+.

Release boundaries

• No package publication, live/GPU qualification, service deployment, authorization, model allowlist, or feature-enablement change is performed.
• Remote CI/API approval is still required; local checks are not a claim that remote CI is green.
• This PR includes the beta version update and overlaps the existing version-only bot PR Increment version for ai releases #49248. Coordinate that PR rather than applying a conflicting duplicate bump.

The standard MCP generation attempt encountered Windows temporary-environment cleanup failure; the existing strict generation verifier supplied the actual isolated emissions and equality proof. Public specification source remains authoritative.

Latest Loom beta refresh (2026-11-03)

Updated SDK head: ff091ce93265614988f23c7dcd164e5f28b91ab1. Generation pins public TypeSpec e4f4ef32fd1048584b106c0eeb07fd1e0a5286b5 from Azure/azure-rest-api-specs#47795.

Included optional text-only reasoning_effort from latest assessed Loom master d9f379e1b0f825dfa61a4da41998b03d2189ea8c, plus untagged non-sampling completion compatibility coverage. User explicitly selected preparation-only: the newer local checkpoint downloader is excluded, and preparation/authentication ASTs are unchanged. No feature gates, deployment, or package publication changed.

Validation: 2,528 source tests pass on Python 3.13; 2,527 source and installed-wheel tests pass on Python 3.10/minimum Azure Core. Expected skips are 72/73. Two fresh emissions match all 21 generated entries and the complete 32-file runtime. Pylint, MyPy, Pyright, all 74 spelling-checked files, 16 maintainer tests, strict TypeSpec compile, and 39 mirror workflow tests pass. Corrected the three existing spelling false positives without changing malicious-path fixtures.

The failed MCP run overwrote packaging settings and hit Windows cleanup errors; original pyproject/MANIFEST were restored exactly. Clean wheel/sdist contents and generation inputs were verified; generator/build dependencies are not packaged. The refreshed API snapshot and current inclusion/exclusion provenance are checked in. Live gateway/RP/APIM qualification and human release approval are still required.

[azure-pipelines]

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[github-actions]

[Pilot] PR Pipeline Failure Analysis

What failed

Two independent checks failed on this PR:

1. CSpell unknown words — Azure Pipelines python - pullrequest, build 7022747:

   • sdk/ai/azure-ai-finetuningsessions/azure/ai/finetuningsessions/_checkpoint_download.py:30:49 — Unknown word (CONIN)
   • sdk/ai/azure-ai-finetuningsessions/tests/test_checkpoint_download.py:150:10 — Unknown word (CONIN)
   • sdk/ai/azure-ai-finetuningsessions/tests/test_checkpoint_download.py:351:16 — Unknown word (ffiles)

2. Verify Links — GitHub Actions run: sdk/ai/azure-ai-finetuningsessions/GENERATION.md has 4 broken relative links: tsp-location.yaml, eng/generation/provenance.json, tests/test_model_primitive_serialization.py, scripts/verify_generation.py.

Relevant pipeline output

2026-10-30T22:41:39.0147458Z ##[error]sdk/ai/azure-ai-finetuningsessions/azure/ai/finetuningsessions/_checkpoint_download.py:30:49 - Unknown word (CONIN)
2026-10-30T22:41:39.0153119Z ##[error]sdk/ai/azure-ai-finetuningsessions/tests/test_checkpoint_download.py:150:10 - Unknown word (CONIN)
2026-10-30T22:41:39.0158549Z ##[error]sdk/ai/azure-ai-finetuningsessions/tests/test_checkpoint_download.py:351:16 - Unknown word (ffiles)
2026-10-30T22:41:39.0163922Z ##[error]Spelling errors detected.
2026-10-30T22:41:39.0801101Z ##[error]PowerShell exited with code '1'.

Summary of broken links (GENERATION.md): 4 broken link(s):
  tsp-location.yaml
  eng/generation/provenance.json
  tests/test_model_primitive_serialization.py
  scripts/verify_generation.py
Checked 43 links with 1 broken link(s) found.

Root cause

• CONIN and ffiles are legitimate intentional tokens (a Windows reserved device name CONIN$, and a URL-encoded test fixture %2ffiles), not misspellings — they're simply missing from the cspell allowlist.
• The 4 broken GENERATION.md links use bare relative paths instead of the {public} placeholder prefix used by other links in the same file (e.g. [tsp-location.yaml]({public}tsp-location.yaml)), so the link checker can't resolve them.

Recommended next steps

• Add CONIN and ffiles to .vscode/cspell.json's word list.
• Update the 4 new links in GENERATION.md to use the {public} placeholder prefix, matching the existing link style in that file.
• See https://aka.ms/ci-fix

Automated fix: Fix found, view and apply fix

Generated by Pipeline Analysis Next Steps · copilot · sonnet50 · 94.6 AIC · ⌖ 0.568 AIC · ⊞ 8.9K · ◷