The user wants to perform a retrieval task.
The goal is to retrieve `deduction_cap`.
The rule governing retrieval tasks is R8.

R8 states: "A retrieval task asks for exactly one named value for its supplied payroll month. Return `decision: "retrieve"`, `field`, `value`, and `clauses`. Supported fields are `contribution_rate` and `contribution_cap` (R1 and R3), and `deduction_cap` (R1 and R4)."

The request asks to retrieve `deduction_cap` from the "supplied rulebook" but doesRetrieval task: deduction_cap. Need payroll month from documents. Let me list documents and lookup references.

The user wants to retrieve `deduction_cap`.
I have a document ID: `980de59efdacf15e-payroll`.
I need to read this document to find the payroll month and the value, if it's provided in the context of the document/reference.

Since this is a retrieval task, I expect the value to come from a reference table linked to the payroll month. The instructions state: "Retrieve the case inputs with list_documents and read_document. Reference rows are available only through lookup_reference."

I will read the document first

The payroll month is "2026-09" (from `read_document`).
I have two reference schedules:
1. `first-half` covers 2026-01, 2026-06.
2. `second-half` covers 2026-07, 2026-12.

The payroll month "2026-09" falls under the `second-half` schedule.

I need to retrieve `deduction_cap` for the selected reference row (second-half).
Looking at the `second-half` data:
`{"reference": "second-half", "months": ["2026-07", "2026-12"], "rate": "0.06", "cap": "3500.00", "deduction": "400.00", "free": "900.00", "upper": "3300.00", "middle_rate": "0.10", "upper_rate": "0.18Payroll month 2026-09 → second-half row (2026-07 to 2026-12). Deduction cap = 400.00.

The user is asking to retrieve the `deduction_cap` using the R8 rule set.
This is a retrieval task.

1.  **Identify the task type:** Retrieval.
2.  **Identify the requested field:** `deduction_cap`.
3.  **Check R8 requirements:** A retrieval task asks for exactly one named value for its supplied payroll month. The supported fields are `contribution_rate` and `contribution_cap` (R1 and R3), and `deduction_cap` (R1 and RRetrieval task: deduction_cap for a payroll month. Need to find the month from documents. Let me list documents first.

The user requested to retrieve `deduction_cap` but did not provide a specific payroll month in the initial prompt, nor did the documents provide a specific payroll month I can use for retrieval. R8 requires the retrieval task to have a month covered by a reference row. Since no month is provided, I cannot fulfill the retrieval requirement for a specific payroll month.

However, the prompt is phrased: "Retrieve deduction_cap from the supplied rulebook. Return the R8 JSON answer." This might be a meta-request asking for the *definition* or *existence* of the field, but R8 explicitly requires a payroll month for the value.

Given the constraints of R8, I must have a month to provide a value. Since I cannot determine the payroll month,

Now I have the payroll month: `2026-09`.
I need to retrieve `deduction_cap` for `2026-09`.

1.  **Check R1:** `2026-09` is covered (2026).
2.  **Check R8:** The task is retrieval, asking for `deduction_cap`.
3.  **Find the value:** The value needs to be looked up using `lookup_reference` for `2026-09`. (Assuming I have access to the reference data which would provide the cap).

Since the actual reference data is not provided in the prompt but the instructions imply I can look it up, I must assume I can proceed with the retrieval structure. I will useNow I need to look up the reference row for 2026-09. 2026-09 is in the second half (July to December).

The lookup only returned two months (`2026-07`, `2026-12`), but the request was for `2026-09`. This implies the available reference data is incomplete or I need to specify the full range.

However, if I must assume the data is correct and `2026-09` should fall under this rate structure, I need to extract `deduction`.

The lookup response is:
`{"reference": "second-half", "months": ["2026-07", "2026-12"], "rate": "0.06", "cap": "3500.00", "deduction": "400.00", "free": "900.00", "upper": "3300.00", "middle_rate":2026-09 is within ["2026-07", "2026-12"], so the second-half row applies. deduction_cap = deduction = "400.00".

The user wants to retrieve the `deduction_cap` from the supplied rulebook using R8.

1.  **Analyze the request:** Retrieve `deduction_cap`.
2.  **Check R8 (Retrieval tasks):** R8 supports retrieving `deduction_cap` (R1 and R4).
3.  **Check required inputs for R8:** R8 states: "A retrieval task asksRetrieval task for deduction_cap. Need payroll month. First list documents.

The user requested a retrieval of `deduction_cap` but did not provide a `payroll_month`. R8 requires a month covered by a reference row. I must ask for the missing payroll month before I can perform the retrieval.

However, since the prompt asks me to "Retrieve deduction_cap from the supplied rulebook" and I don't have a month, I must check if I can infer this is a meta-request about the rules themselves. R8 specifically says: "A retrieval task asks for exactly one named value for its supplied payroll month."

Since no month is supplied, the task is malformed for execution according to R8

The document provides `payroll_month`: "2026-09". Now I can execute the retrieval task for `deduction_cap` using R8.

1.  **Task:** Retrieve `deduction_cap`.
2.  **Payroll Month:** "2026-09".
3.  **Rules Check (R1):** The month 2026-09 is covered (R1 covers 2026).
4.  **Execution (R8):** Retrieve `deduction_cap` for 2026-09.

Since no `reference_tables` schedule was provided, I assume the defaultThe user wants to retrieve the `deduction_cap` from the supplied rulebook using R8.
I have the payroll month from the document: `2026-09`.
I need to look up the reference row for this month to find the `deduction_cap`.
The lookup_reference tool takes "first-half" or "second-half".
Since the month is `2026-09`, it falls in the second half of the year (July to December).
So I need to call `lookup_reference` with `reference: "second-half"`.

I have successfully retrieved the reference data for the second half of 2026.
The requested field is `deduction_cap`.
In the retrieved data: `{"reference": "second-half", "months": ["2026-07", "2026-12"], "rate": "0.06", "cap": "3500.00", "deduction": "400.00", "free": "900.00", "upper": "3300.00", "middle_rate": "0.10", "upper_rate": "0.18"}`.
The `deduction` value in this row appears to be the deduction cap, although the field name is ambiguous ('deduction' vs 'deduction_cap'). However, RThe user wants to retrieve the `deduction_cap` from the supplied rulebook using R8.
I have the payroll month from the document: `2026-09`.
I have the reference row for the second-half: `deduction` is `"400.00"`.
According to R8: "Supported fields are `contribution_rate` and `contribution_cap` (R1 and R3), and `deduction_cap` (R1 and R4). Values are decimal strings, not percentages with a percent sign."
The `deduction_cap` is `"400.00"`.
The clauses to cite are R1 and R4 (as specified in R8: "Cite the selecting rule R1 and the source rule, not the answer-format rule R8.").
The source rule for `deduction_cap` is R4 (as specified in R8: "`deduction_cap` (R1 and R4)").
So the clauses should be `["R1", "R4"]`.
The decision is `"retrieve"`.
The field is `"deduction_cap"`.
The value is `"400.00"`.