Implementation Plan: open-pr Skill Strips PART X ONLY Suffix from PR Title

[Trecek]

Summary

The open-pr skill's Step 2 extracts the first # heading from the plan file verbatim and uses it as the PR title. Because make-plan and rectify mandate that multi-part plan files include — PART X ONLY in their heading (e.g., # Implementation Plan: Foo — PART A ONLY), this internal scope marker leaks directly into the PR title — making PRs appear partial when all parts are implemented.

The fix is two-part: (1) update the bash block at Step 2 to pipe through a sed that strips the suffix from the extracted heading, and (2) update the Step 2 prose to explicitly instruct stripping the suffix before passing headings to the multi-plan subagent synthesis path. A contract test is added to guard against regression.

Architecture Impact

Process Flow Diagram

%%{init: {'flowchart': {'nodeSpacing': 50, 'rankSpacing': 60, 'curve': 'basis'}}}%%
flowchart TB
    %% CLASS DEFINITIONS %%
    classDef terminal fill:#1a237e,stroke:#7986cb,stroke-width:2px,color:#fff;
    classDef stateNode fill:#004d40,stroke:#4db6ac,stroke-width:2px,color:#fff;
    classDef handler fill:#e65100,stroke:#ffb74d,stroke-width:2px,color:#fff;
    classDef phase fill:#6a1b9a,stroke:#ba68c8,stroke-width:2px,color:#fff;
    classDef detector fill:#b71c1c,stroke:#ef5350,stroke-width:2px,color:#fff;
    classDef output fill:#00695c,stroke:#4db6ac,stroke-width:2px,color:#fff;
    classDef newComponent fill:#2e7d32,stroke:#81c784,stroke-width:2px,color:#fff;

    START([START])
    END([END])

    subgraph Extract ["● Step 2: Title Extraction (open-pr/SKILL.md)"]
        direction TB
        HeadExtract["Extract heading<br/>━━━━━━━━━━<br/>head -1 {plan_path}<br/>sed 's/^# //'"]
        StripSuffix["● Strip PART X ONLY suffix<br/>━━━━━━━━━━<br/>sed 's/ *— *PART [A-Z] ONLY$//'<br/>guards against scope-marker leakage"]
    end

    subgraph PlanRoute ["Plan Count Routing"]
        PlanCount{"single or<br/>multiple plans?"}
        SingleUse["Use directly<br/>━━━━━━━━━━<br/>BASE_TITLE = stripped heading"]
        MultiSynth["Subagent synthesis<br/>━━━━━━━━━━<br/>sonnet subagent<br/>synthesizes clean title"]
    end

    subgraph PrefixApply ["Step 2b: run_name Prefix"]
        RunNameCheck{"run_name<br/>switch"}
        FeaturePrefix["[FEATURE] BASE_TITLE<br/>━━━━━━━━━━<br/>run_name starts with 'feature'"]
        FixPrefix["[FIX] BASE_TITLE<br/>━━━━━━━━━━<br/>run_name starts with 'fix'"]
        NoPrefix["BASE_TITLE unchanged<br/>━━━━━━━━━━<br/>any other run_name (e.g. 'impl')"]
    end

    PRCreate["gh pr create<br/>━━━━━━━━━━<br/>--title TITLE"]

    ContractTests["● Contract Tests<br/>━━━━━━━━━━<br/>test_part_suffix_stripped_in_bash_block<br/>test_step2_prose_instructs_suffix_stripping"]

    START --> HeadExtract
    HeadExtract --> StripSuffix
    StripSuffix --> PlanCount
    PlanCount -->|"single"| SingleUse
    PlanCount -->|"multiple"| MultiSynth
    SingleUse --> RunNameCheck
    MultiSynth --> RunNameCheck
    RunNameCheck -->|"feature*"| FeaturePrefix
    RunNameCheck -->|"fix*"| FixPrefix
    RunNameCheck -->|"other"| NoPrefix
    FeaturePrefix --> PRCreate
    FixPrefix --> PRCreate
    NoPrefix --> PRCreate
    PRCreate --> END

    ContractTests -.->|"guards"| StripSuffix

    class START,END terminal;
    class HeadExtract handler;
    class StripSuffix newComponent;
    class PlanCount,RunNameCheck detector;
    class SingleUse,MultiSynth phase;
    class FeaturePrefix,FixPrefix,NoPrefix stateNode;
    class PRCreate output;
    class ContractTests newComponent;

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Color Legend:

Color	Category	Description
Dark Blue	Terminal	Start and end points
Orange	Handler	Heading extraction processing
Green	Modified	● Nodes modified by this PR (suffix strip, contract tests)
Red	Detector	Decision points (plan count, run_name switch)
Purple	Phase	Synthesis paths (direct use, subagent)
Teal	State	Prefix variant state nodes
Dark Teal	Output	gh pr create invocation

Closes #488

Implementation Plan

Plan file: /home/talon/projects/autoskillit-runs/impl-20260322-203748-209804/temp/make-plan/open_pr_part_suffix_plan_2026-03-22_000000.md

🤖 Generated with Claude Code via AutoSkillit

[Trecek]

AutoSkillit PR Review — Verdict: changes_requested (COMMENT event used — cannot request_changes on own PR)

[Trecek]

AutoSkillit review found 3 blocking issues (changes_requested verdict). See inline comments above for details.

[Trecek]

AutoSkillit review found 3 blocking issues (verdict: changes_requested). See inline comments for details.