Choose a Story from durable state

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Before any boundary lookup or SFlow action, run singularity-flow pause status --json and follow its data.agentInstruction. If data.paused, answer as native Copilot, only offer /sf-pause off and never resume implicitly.

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Output contract: Collect every required choice explicitly; never infer or preselect; preserve errors, artifacts, and next actions. Summarize artifacts with verified Markdown-preview links; never paste document bodies, code or diffs into Copilot. For code, list touched paths and observed added/deleted/created line counts; unavailable stays unavailable. Use existing evidence, not extra calls solely for display. Summaries, links and opened previews are not human review or approval. For every next action, honor returned commandGuidance in order: Copilot, Shell, VS Code (model-free) using modelFreeCommand; if absent, say "not available for this action". Missing Copilot: "no verified equivalent". Never invent routes.

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Boundary: machine-local; no repository or Story required. Use explicit arguments or SFlow-returned paths; never search $HOME or infer a repository. Use exact CLI-returned paths. repositoryPath is command cwd, not a prefix for absolute file paths. Never rebase paths or strip .git/worktrees. Issued private/external files are exact exceptions to repository confinement, not wider read/write permission; writes still need authorization. Resolve relative paths only against their declared base. On failure, preserve the path and error; never search or recreate it.

1. Preserve explicit --workspace <WORKSPACE> --repository <REPOSITORY-ID> selectors. Partial selectors: resolve only within the explicit workspace or ask; never fill from active workspace/cwd. With none supplied, run singularity-flow workspace current --json; when active, capture its exact workspacePath and repositoryId and pass both as selectors. Never let an old host cwd override that selected workspace. With no active workspace, an opened Git root is a valid discovery scope; if unresolved, ask for /sf-workspace and stop. Never guess URLs or use a planned checkout as cwd.
2. Run singularity-flow session candidates --table with that scope. Relay the complete CLI table, progress, active markers, scope, warnings, and errors verbatim. Do not hide inactive Stories, invent progress, make per-Story status calls, or use Home headings. Candidate repositoryPath is only the discovery source, not the destination. For an explicit list-only request, end here without selection.
3. Ask with ask_user or plain chat for an exact Story ID or row number. Map a row only to the exact ID in that returned table. Preserve the table's workspace/repository selectors. Never auto-attach the first or current Story; ambiguous, absent, or unavailable choices require clarification, not attachment.
4. After the contributor explicitly chooses, invoke and complete existing /sf-session <WORK-ID> with those exact selectors in this flow, not merely display its route. It tries a managed local checkout first and permits verified remote attachment only on its specified unavailable-local refusals. Verify the returned checkout and session status ready, workId, and activeAgent; do not assume attachment has activeAgent or run a second attachment sequence here.
5. Stop after session setup. Discovery alone changes no active Story. Do not create, advance, begin, submit, approve, merge, publish, or execute Story work.