Auto-attach original spec context to implement-spec prompt#76
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When a run is created on a branch that was seeded from a prior draft
run, surface the original spec to the LLM so it has the full intent
behind the feature—not just the current (possibly narrowed) spec.
- Add `original_spec` module that resolves and renders the preamble
from a prior run, an open PR, or commits-only history
- Add `find_original_run_on_branch` to locate the earliest draft run
that created a given branch
- Inject `{{ORIGINAL_SPEC}}` placeholder into the implement-spec
template and render it before each LLM invocation
- Log the rendered prompt (with attempt/timestamp) to the step log
so retries are fully auditable
- Emit a `original-spec: attached from <label>` diagnostic to stderr
at `draft create` time; silenced when nothing is found or resolver
errors
- Rename "Verify commands" / "Test failures" headings to "Verified
commands" / "Verified errors" for consistency
Some environments write timestamps with a "Z" suffix which `parse_human` cannot handle. Add a fallback that normalises the "Z" to "+00:00" before parsing with `datetime.fromisoformat`.
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Summary
original_specmodule understeps/implement_spec/that resolves branch context from a prior run, an open PR, or commits-only history, and renders the appropriate## Original specMarkdown fragment into the LLM promptfind_original_run_on_branchtoruns.pyto locate the earliest draft run that seeded a given branch, enabling follow-updraft create --branch <existing>runs to recover the original intent<run_dir>/implement-spec.logbefore eachengine.run_llmcall for auditability across retriesTest plan
tests/draft/test_original_spec.pyexercisesresolve_case,render_original_spec, andpreamble_labelacross all cases: new branch, prior run with readable/deleted spec, open PR, commits-only, corruptstate.json, missingbranch_source, and earliest-run selectiontests/draft/test_code_spec.pycovers_log_promptappend behavior, two-retry ordering, OSError warning path,_log_prompt-before-run_llmcall order, heading renames, four-placeholder substitution, and bundled template marker presencetests/draft/test_commands.pycovers preamble emission, suppression on resolver error, and silence forNonelabel