Backlog Module Ownership Cleanup

[djm81]

Backlog Module Ownership Cleanup

Why

Backlog command ownership is still split across specfact-cli core shims, the built-in backlog-core package, and the marketplace bundle nold-ai/specfact-backlog. That violates the intended module boundary, causes duplicate command overlap, and leaves backlog prompts/templates coupled to core code even though they belong to backlog behavior.

What Changes

• Make nold-ai/specfact-backlog the sole owner of user-facing backlog and policy commands.
• Remove backlog command ownership and backlog-specific prompt/template assets from specfact-cli core.
• Keep only truly shared runtime contracts, provider adapters, and generic data models in core.
• Move backlog-coupled prompt and template resources out of core so prompt ownership matches command ownership.
• Remove duplicate-registration fallback behavior once backlog is module-owned and no longer overlaps with core.

Capabilities

New Capabilities

• backlog-module-ownership: Backlog commands, prompts, and templates are owned by the backlog module instead of being split across core and module layers.

Acceptance Criteria

• Running specfact with nold-ai/specfact-backlog installed does not produce duplicate backlog command overlap warnings during normal startup.
• User-facing backlog commands are provided only by the installed backlog module, not by a parallel core backlog command surface.
• Backlog-specific prompts and templates are shipped from the backlog module instead of core CLI resources.
• Core retains only shared runtime contracts, provider integrations, and generic data models required by multiple modules.
• Validation and command-audit coverage prove the backlog command tree works end-to-end with module-only ownership.

Dependencies

• module-migration-06-core-decoupling-cleanup ([Change] module-migration-06 - Core Decoupling Cleanup After Module Extraction #338) and module-migration-07-test-migration-cleanup ([Change] module-migration-07 - Test Migration Cleanup After Core Slimming #339) establish the broader module-migration baseline.
• cli-val-07-command-package-runtime-validation documents the duplicate-command/runtime-noise findings this cleanup resolves.
• init-ide-prompt-source-selection depends on this cleanup to finalize prompt ownership boundaries.

Impact

• Affected code: modules/backlog-core, src/specfact_cli/commands/backlog_commands.py, src/specfact_cli/groups/backlog_group.py, backlog-specific core runtime/helpers/resources.
• Affected repos: specfact-cli and specfact-cli-modules.
• User-visible result: backlog command ownership becomes unambiguous, startup is quiet, and module boundaries match the intended architecture.

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OpenSpec Change Proposal: backlog-module-ownership-cleanup