goal-instruction-writer – skill Viết lách & Nội dung cho agent AI

Goal Instruction Writer

Overview

Turn a vague request into a ready-to-run Goal instruction that an agent can

execute without guessing what success, progress, or stopping means. Preserve

the user's intent, language, authority boundaries, and requested scope.

This skill designs and audits the instruction contract; runtime access,

permissions, and external approvals still come from the host agent and user.

Describe the checks while writing a Goal; execute the underlying task only

when the user has also requested execution.

Read [references/goal-contract.md](references/goal-contract.md) when drafting

or auditing a Goal. Read [references/examples.md](references/examples.md) only

when a worked example would clarify the requested task. For work that spans

multiple phases, artifacts, or more than a few iterations, also read

[references/drift-control.md](references/drift-control.md). For preview-first

workflows, read [references/loop-preview.md](references/loop-preview.md).

When to Use

• Use when the user asks to preview, draft, refine, or audit a Goal for a multi-stage agent task.
• Use when acceptance evidence, scope, verification cadence, drift recovery, or external waiting is ambiguous.
• Use for instruction design; ordinary one-shot prompts do not need this skill. Use goal-loop when the request is primarily about operating a host's native Goal loop.

Choose the mode

• Draft: build a Goal from a rough request.
• Refine: preserve an existing Goal while closing missing objective,

evidence, loop, or termination fields.

• Audit: identify ambiguity, unbounded repetition, unverifiable criteria,

and unsafe or unauthorized transitions; propose the smallest fixes.

• Convert: turn a checklist, ticket, or project brief into a Goal without

expanding its scope.

• Preview: show the concrete loop, branches, drift gates, and stop

conditions before writing the final Goal. Do not emit an executable Goal or

perform external work in this mode.

If the mode is not stated, infer it from the input. Ask only questions whose

answers would change the objective, authority, acceptance evidence, or legal

terminal state. Otherwise state assumptions and continue.

Preview before drafting

Use preview-first when the user asks to “先看循环”, “preview”, “先设计流程”,

or similar. Also prefer it for multi-stage, costly, irreversible, or materially

uncertain work. For a short, reversible task, a direct draft is enough.

The preview is a design checkpoint, not an approval to execute:

1. State the provisional outcome, baseline, and assumptions.

2. Show the loop as concrete state transitions, including the first work unit,

success and failure branches, progress evidence, drift checks, phase gates,

and legal stop states. Distinguish iteration checks from broader phase or

delivery checks, including evidence reuse and bounds for expensive checks.

3. List the decisions that could change the loop or its scope. For feedback,

adoption, pilot, launch, or validation work, include the evidence threshold,

what counts, and the feedback window.

4. End with a clear handoff: wait for the user to confirm or revise the loop

before generating the final Goal.

When the user confirms, carry the accepted preview into the final Goal without

quietly changing its loop, scope, or terminal rules. If the user revises it,

regenerate the preview or record the changed decision first. A preview response

must not claim that the Goal is complete and must not perform external side

effects merely because a loop was described.

Build the three-layer contract

1. Goal: define the outcome

Write one sentence with an observable end state. It should say what artifact,

behavior, decision, or verified change will exist when the work is complete.

Then make the contract concrete:

• Baseline: what exists now and which revision, source, or facts are

authoritative.

• Scope: what may change and what is frozen.
• Acceptance criteria: observable checks tied to evidence, not activities

such as “keep working” or “try harder.”

• Dependencies and authority: tools, access, owner decisions, and external

gates the agent may or may not cross.

• Deliverable: the files, decision, report, or message that will be handed

back.

For Goals about feedback, adoption, pilots, launches, or validation, define a

feedback evidence threshold before drafting: what counts as feedback,

whether an entry point is enough or at least N non-author responses are

required, and the timebox or attempt window. Do not count author-only activity

unless the user explicitly chooses that threshold.

Prefer one load-bearing outcome per Goal. Split unrelated outcomes into

separate Goals. Replace vague verbs such as “improve,” “handle,” or “finish”

with a measurable result.

Prevent drift in long-running work

For a long or multi-stage Goal, freeze a compact Goal Anchor before the

first iteration: the one-sentence outcome, criterion IDs, frozen scope, and

current phase. Treat it as an invariant. A new discovery may change the plan,

but it must not silently change the outcome, acceptance criteria, or authority.

An explicit owner decision creates a new Goal version or scope-change record.

At every iteration, record three links before acting:

1. Target criterion: which acceptance criterion this work advances.

2. Expected delta: what observable evidence should change if it works.

3. Scope reason: why this action is inside the frozen boundary now.

After verification, classify the result as:

• ON_TARGET: the named criterion moved or new relevant evidence supports a

justified next step.

• SIDE_QUEST: useful but not required for this Goal; park it in a deferred

list instead of expanding the loop.

• DRIFTED: the action changed the goal or scope without authorization, the

next step cannot be justified from the Anchor, or the no-progress threshold

is reached; stop and realign.

Run a phase gate every 3–5 iterations by default, at each milestone, and before

an irreversible or high-cost action. Re-read the Anchor, compare the current

state with the baseline, mark criteria open or verified, review deferred side

quests, and choose one justified next action. Never rewrite criteria to make

completed work appear on target.

2. Loop: define how progress is made

Use a bounded iteration with a visible progress signal:

1. Inspect the current state and the last durable cursor.

2. Select the smallest next work unit, name its target criterion, expected

delta, and scope reason.

3. Act within the allowed scope and authority.

4. Verify the result against the relevant criterion using the verification

strategy below; capture the evidence.

5. Classify the result as ON_TARGET, SIDE_QUEST, or DRIFTED and apply

the corresponding drift rule.

6. Record the delta, remaining gap, decision, and next cursor before

another iteration.

State the iteration limit that fits the task: a timebox, tool or token budget,

maximum attempts, or a finite work-unit list. Add a no-op rule: do not repeat

the same action without new information; after a repeated failure, change the

hypothesis or stop with the blocker. The loop must be able to explain why the

next iteration is different from the previous one.

For external dependencies, record the unmet criterion, next check time or

relevant notification, and deadline. Before that trigger, continue independent

work or yield with the checkpoint preserved. Waiting and a due check that

confirms the dependency is still pending do not count as failed actionable

attempts toward the default two-equivalent-no-progress threshold. Actual tool

calls and elapsed time still count against host limits. See

[scheduled waits](references/drift-control.md#scheduled-external-waits)

for polling, resumption, and deadline rules.

Verification strategy

Include a short verification strategy in the Goal. Preserve explicit user and

repository acceptance requirements while controlling when checks run:

• Iteration checks: choose the smallest checks sufficient for the affected

behavior. Broaden for change impact, new failures, unresolved uncertainty,

or a required gate.

• Phase and delivery checks: once the relevant implementation is stable,

complete the remaining required regression, build, integration, and artifact

checks. A phase gate reviews current evidence; it does not automatically

repeat the entire validation and delivery pipeline.

• Evidence reuse: tie results to the checked source or artifact, relevant

inputs, dependencies, and environment. Carry forward results while those

conditions remain valid. Documentation or receipt changes do not invalidate

unrelated runtime checks. Distinguish reused evidence from newly run checks.

• Rerun reason: before repeating a check, name the change or new evidence

that invalidates its result and select the affected checks. A source or

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