SyncValsverifier → artifact → classifier → verdict
SyncVals · Trajectory

open-drain-command-engine

codex gpt-5.5 ✓ resolved GOOD_SUCCESS ↑ View task
Solved from the instruction alone, tests/ and solution/ were withheld from the agent's workspace and restored only for grading.
Reward = tests/test.sh exit code (0 → resolved); the classification below is post-hoc and cannot change it.
Classification , post-hoc; cannot change the reward
GOOD_SUCCESSLegitimate solve, implements the asked-for behavior; tests verify real functionality.
SubtypeLegitimate Solution
EvidenceTest output: 'MISMATCH_COUNTS cmd_ack=0 busy=0 al=0 bit_out=0 scl=0 sda=0' with 'mismatches=0 samples=2351', reward=1.0. Agent created TopModule instantiating I2cCommandController with complete FSM covering all command phases (START, STOP, WRITE, READ), proper registered outputs, synchronous reset, open-drain semantics (1=drive low, 0=release), timing-aware state sequences with intermediate 'wait observed high' states, and sticky arbitration detection. iverilog syntax check passed with no warnings.
Root causeThe agent correctly implemented a complex multi-module I2C protocol controller FSM that satisfies all behavioral requirements: registered outputs, command acceptance rules, open-drain drive semantics, stretch-aware timing with one-clock observation delays, and sticky arbitration loss detection. The implementation passed verification with zero mismatches across 2351 test samples.
RecommendationN/A - task is fine
Trajectory
Tool-by-tool agent trajectory
8 tool calls · 2 tool types · 16 steps
<permissions instructions> Filesystem sandboxing defines which files can be read or written. `sandbox_mode` is `danger-full-access`: No filesystem sandboxing - all commands are permitted. Network access is enabled. Approval policy is currently never. Do not provide the `sandbox_permissions` for any reason, commands will be rejected. </permissions instructions><apps_instructions> ## Apps (Connectors) Apps (Connectors) can be explicitly triggered in user messages in the format `[$app-name](app://{connector_id})`. Apps can also be implicitly triggered as long as the context suggests usage of available apps. An app is equivalent to a set of MCP tools within the `codex_apps` MCP. An installed app's MCP tools are either provided to you already, or can be lazy-loaded through the `tool_search` tool. If `tool_search` is available, the apps that are searchable by `tools_search` will be listed by it. Do not additionally call list_mcp_resources or list_mcp_resource_templates for apps. </apps_instructions><skills_instructions> ## Skills A skill is a set of instructions provided through a `SKILL.md` source. Below is the list of skills that can be used. Each entry includes a name, description, and source locator. `file` locators are on the host filesystem, `environment resource` locators are owned by an execution environment, `orchestrator resource` locators are opaque non-filesystem resources, and `custom resource` locators use their provider's access mechanism. ### Available skills - imagegen: Generate or edit raster images when the task benefits from AI-created bitmap visuals such as photos, illustrations, textures, sprites, mockups, or transparent-background cutouts. Use when Codex should create a brand-new image, transform an existing image, or derive visual variants from references, and the output should be a bitmap asset rather than repo-native code or vector. Do not use when the task is better handled by editing existing SVG/vector/code-native assets, extending an established icon or logo system, or building the visual directly in HTML/CSS/canvas. (file: /tmp/codex-home/skills/.system/imagegen/SKILL.md) - openai-docs: Use when the user asks how to build with OpenAI products or APIs, asks about Codex itself or choosing Codex surfaces, needs up-to-date official documentation with citations, help choosing the latest model for a use case, or model upgrade and prompt-upgrade guidance; use OpenAI docs MCP tools for non-Codex docs questions, use the Codex manual helper first for broad Codex self-knowledge, and restrict fallback browsing to official OpenAI domains. (file: /tmp/codex-home/skills/.system/openai-docs/SKILL.md) - plugin-creator: Create and scaffold plugin directories for Codex with a required `.codex-plugin/plugin.json`, optional plugin folders/files, valid manifest defaults, and personal-marketplace entries by default. Use when Codex needs to create a new personal plugin, add optional plugin structure, generate or update marketplace entries for plugin ordering and availability metadata, or update an existing local plugin during development with the CLI-driven cachebuster and reinstall flow. (file: /tmp/codex-home/skills/.system/plugin-creator/SKILL.md) - skill-creator: Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Codex's capabilities with specialized knowledge, workflows, or tool integrations. (file: /tmp/codex-home/skills/.system/skill-creator/SKILL.md) - skill-installer: Install Codex skills into $CODEX_HOME/skills from a curated list or a [code-host] repo path. Use when a user asks to list installable skills, install a curated skill, or install a skill from another repo (including private repos). (file: /tmp/codex-home/skills/.system/skill-installer/SKILL.md) ### How to use skills - Discovery: The list above is the skills available in this session (name + description + source locator). `file` entries live on the host filesystem, `environment resource` entries are owned by their execution environment, `orchestrator resource` entries must be accessed through `skills.list` and `skills.read`, and `custom resource` entries use their provider's access mechanism. - Trigger rules: If the user names a skill (with `$SkillName` or plain text) OR the task clearly matches a skill's description shown above, you must use that skill for that turn. Multiple mentions mean use them all. Do not carry skills across turns unless re-mentioned. - Missing/blocked: If a named skill isn't in the list or its source can't be read, say so briefly and continue with the best fallback. - How to use a skill (progressive disclosure): 1) After deciding to use a skill, the main agent must read its `SKILL.md` completely before taking task actions. For a `file` entry, open the listed path. For an `environment resource`, use the filesystem of the owning environment. For an `orchestrator resource`, call `skills.list` with `{"authority":{"kind":"orchestrator"}}`, select the matching package, and pass its `main_resource` to `skills.read`. If a read is truncated or paginated, continue until EOF. 2) When `SKILL.md` references another resource, use the same access mechanism. Resolve relative paths against a filesystem-backed skill directory. For orchestrator skills, pass the exact referenced resource identifier with the same authority and package to `skills.read`; do not treat `skill://` identifiers as filesystem paths. 3) If `SKILL.md` points to extra folders such as `references/`, use its routing instructions to identify the resources required for the task. The main agent must read each required instruction or reference file itself before acting on it. Do not delegate reading, summarizing, or interpreting skill instructions to a subagent. Subagents may still perform task work when the selected skill allows it. 4) For filesystem-backed skills, prefer running or patching provided scripts instead of retyping large code blocks. For orchestrator skills, use `skills.read` and the available tools; do not invent a local path. 5) Reuse provided assets or templates through the same source access mechanism instead of recreating them. - Coordination and sequencing: - If multiple skills apply, choose the minimal set that covers the request and state the order you'll use them. - Announce which skill(s) you're using and why (one short line). If you skip an obvious skill, say why. - Context hygiene: - Progressive disclosure applies to selecting relevant files, not partially reading a selected instruction file. Do not load unrelated references, scripts, or assets. - Avoid deep reference-chasing: prefer opening only files directly linked from `SKILL.md` unless you're blocked. - When variants exist (frameworks, providers, domains), pick only the relevant reference file(s) and note that choice. - Safety and fallback: If a skill can't be applied cleanly (missing files, unclear instructions), state the issue, pick the next-best approach, and continue. </skills_instructions>
<environment_context> <cwd>/app</cwd> <shell>bash</shell> <current_date>2026-06-20</current_date> <timezone>Etc/UTC</timezone> <filesystem><workspace_roots><root>/app</root></workspace_roots><permission_profile type="disabled"><file_system type="unrestricted" /></permission_profile></filesystem> </environment_context>
Implement `/app/dut.sv`. Define `TopModule` with this port list: `input clk, rst, cmd_valid, bit_in, scl_i, sda_i; input [1:0] cmd; output cmd_ack, busy, al, bit_out, scl_drive_low, sda_drive_low;`. Define another module and instantiate it from `TopModule`. `rst` is synchronous active high and clears outputs to 0. All outputs are registered. `cmd_ack` is a one-cycle completion pulse. Accept a command only when none is active; `cmd=0` may be accepted while idle or busy, and other commands only while `busy` is high. Illegal commands leave outputs unchanged and do not acknowledge. The line controls are open-drain: 1 pulls low, 0 releases. The command-accept edge only loads the first registered phase; it must not also consume `scl_i` or sample `sda_i` for phase completion. Because every output is registered, when a later phase says "until `scl_i` is high", the clock edge that observes high only records that fact; the next visible line-drive/ack phase appears on the following clock. Command acceptance itself is a visible registered phase: for stop, write, and read, the line-drive values loaded on the accept edge must be held through one additional full clocked setup cycle before the SCL-release phase begins. `cmd=0` starts or restarts ownership: release both lines on accept, then in following clocked wait phase keep both released until `scl_i` is high, keep SCL released while pulling SDA low for one full cycle, then pull SCL low and pulse `cmd_ack`; `busy` is set from the accept edge. `cmd=1` stops: drive both low on accept, keep both low for the following setup cycle, release SCL until `scl_i` is high, then release SDA, clear `busy`, and pulse `cmd_ack` on the following clock. `cmd=2` writes `bit_in`: on accept drive SCL low and drive SDA low for 0 or released for 1, keep those drive values for the following setup cycle, release SCL until `scl_i` is high, then pull SCL low and acknowledge on the following clock. `cmd=3` reads: on accept drive SCL low and release SDA, keep those drive values for the following setup cycle, release SCL until `scl_i` is high, sample `sda_i` on that high-SCL edge into `bit_out`, then pull SCL low and acknowledge on the following clock. `al` is sticky until reset and asserts only during start or write-1 high-SCL phases when released SDA is observed low.
I’ll inspect the workspace and existing `dut.sv` first, then patch the implementation in place and run a quick syntax check if a Verilog tool is available.
shell
pwd && rg --files -g 'dut.sv' -g '*.sv' -g '*.v'
output
Chunk ID: 3dddf6
Wall time: 0.0000 seconds
Process exited with code 1
Original token count: 2
Output:
/app
shell
sed -n '1,240p' dut.sv
output
Chunk ID: 8d1df6
Wall time: 0.0000 seconds
Process exited with code 2
Original token count: 13
Output:
sed: can't read dut.sv: No such file or directory
shell
ls -la
output
Chunk ID: d12a0e
Wall time: 0.0000 seconds
Process exited with code 0
Original token count: 24
Output:
total 8
drwxr-xr-x 2 root root 4096 Jun 19 22:02 .
drwxr-xr-x 1 root root 4096 Jun 20 17:32 ..
There isn’t an existing `dut.sv`, so I’m creating it from scratch. I’m treating `busy` as bus ownership and using a separate internal command FSM so a restart (`cmd=0`) is legal while already owning the bus, but overlapping command phases are ignored.
I’m going to write the FSM as a Moore-style registered controller with explicit “wait observed high” states. That preserves the required one-clock delay between seeing `scl_i` high and changing line-drive or ack outputs.
apply_patch
*** Begin Patch
*** Add File: /app/dut.sv
+module TopModule(
+    input clk,
+    input rst,
+    input cmd_valid,
+    input bit_in,
+    input scl_i,
+    input sda_i,
+    input [1:0] cmd,
+    output cmd_ack,
+    output busy,
+    output al,
+    output bit_out,
+    output scl_drive_low,
+    output sda_drive_low
+);
+
+    I2cCommandController controller (
+        .clk(clk),
+        .rst(rst),
+        .cmd_valid(cmd_valid),
+        .bit_in(bit_in),
+        .scl_i(scl_i),
+        .sda_i(sda_i),
+        .cmd(cmd),
+        .cmd_ack(cmd_ack),
+        .busy(busy),
+        .al(al),
+        .bit_out(bit_out),
+        .scl_drive_low(scl_drive_low),
+        .sda_drive_low(sda_drive_low)
+    );
+
+endmodule
+
+module I2cCommandController(
+    input logic clk,
+    input logic rst,
+    input logic cmd_valid,
+    input logic bit_in,
+    input logic scl_i,
+    input logic sda_i,
+    input logic [1:0] cmd,
+    output logic cmd_ack,
+    output logic busy,
+    output logic al,
+    output logic bit_out,
+    output logic scl_drive_low,
+    output logic sda_drive_low
+);
+
+    localparam [3:0]
+        ST_READY          = 4'd0,
+        ST_START_WAIT     = 4'd1,
+        ST_START_SDA_LOW  = 4'd2,
+        ST_START_ACK      = 4'd3,
+        ST_STOP_SETUP     = 4'd4,
+        ST_STOP_WAIT      = 4'd5,
+        ST_STOP_ACK       = 4'd6,
+        ST_WRITE_SETUP    = 4'd7,
+        ST_WRITE_WAIT     = 4'd8,
+        ST_WRITE_ACK      = 4'd9,
+        ST_READ_SETUP     = 4'd10,
+        ST_READ_WAIT      = 4'd11,
+        ST_READ_ACK       = 4'd12;
+
+    localparam [1:0]
+        CMD_START = 2'd0,
+        CMD_STOP  = 2'd1,
+        CMD_WRITE = 2'd2,
+        CMD_READ  = 2'd3;
+
+    logic [3:0] state;
+    logic write_bit;
+
+    always_ff @(posedge clk) begin
+        if (rst) begin
+            state <= ST_READY;
+            write_bit <= 1'b0;
+            cmd_ack <= 1'b0;
+            busy <= 1'b0;
+            al <= 1'b0;
+            bit_out <= 1'b0;
+            scl_drive_low <= 1'b0;
+            sda_drive_low <= 1'b0;
+        end else begin
+            cmd_ack <= 1'b0;
+
+            case (state)
+                ST_READY: begin
+                    if (cmd_valid) begin
+                        case (cmd)
+                            CMD_START: begin
+                                busy <= 1'b1;
+                                scl_drive_low <= 1'b0;
+                                sda_drive_low <= 1'b0;
+                                state <= ST_START_WAIT;
+                            end
+
+                            CMD_STOP: begin
+                                if (busy) begin
+                                    scl_drive_low <= 1'b1;
+                                    sda_drive_low <= 1'b1;
+                                    state <= ST_STOP_SETUP;
+                                end
+                            end
+
+                            CMD_WRITE: begin
+                                if (busy) begin
+                                    write_bit <= bit_in;
+                                    scl_drive_low <= 1'b1;
+                                    sda_drive_low <= ~bit_in;
+                                    state <= ST_WRITE_SETUP;
+                                end
+                            end
+
+                            CMD_READ: begin
+                                if (busy) begin
+                                    scl_drive_low <= 1'b1;
+                                    sda_drive_low <= 1'b0;
+                                    state <= ST_READ_SETUP;
+                                end
+                            end
+                        endcase
+                    end
+                end
+
+                ST_START_WAIT: begin
+                    scl_drive_low <= 1'b0;
+                    sda_drive_low <= 1'b0;
+                    if (scl_i) begin
+                        if (!sda_i) begin
+                            al <= 1'b1;
+                        end
+                        state <= ST_START_SDA_LOW;
+                    end
+                end
+
+                ST_START_SDA_LOW: begin
+                    scl_drive_low <= 1'b0;
+                    sda_drive_low <= 1'b1;
+                    state <= ST_START_ACK;
+                end
+
+                ST_START_ACK: begin
+                    scl_drive_low <= 1'b1;
+                    sda_drive_low <= 1'b1;
+                    cmd_ack <= 1'b1;
+                    state <= ST_READY;
+                end
+
+                ST_STOP_SETUP: begin
+                    scl_drive_low <= 1'b1;
+                    sda_drive_low <= 1'b1;
+                    state <= ST_STOP_WAIT;
+                end
+
+                ST_STOP_WAIT: begin
+                    scl_drive_low <= 1'b0;
+                    sda_drive_low <= 1'b1;
+                    if (scl_i) begin
+                        state <= ST_STOP_ACK;
+                    end
+                end
+
+                ST_STOP_ACK: begin
+                    scl_drive_low <= 1'b0;
+                    sda_drive_low <= 1'b0;
+                    busy <= 1'b0;
+                    cmd_ack <= 1'b1;
+                    state <= ST_READY;
+                end
+
+                ST_WRITE_SETUP: begin
+                    scl_drive_low <= 1'b1;
+                    sda_drive_low <= ~write_bit;
+                    state <= ST_WRITE_WAIT;
+                end
+
+                ST_WRITE_WAIT: begin
+                    scl_drive_low <= 1'b0;
+                    sda_drive_low <= ~write_bit;
+                    if (scl_i) begin
+                        if (write_bit && !sda_i) begin
+                            al <= 1'b1;
+                        end
+                        state <= ST_WRITE_ACK;
+                    end
+                end
+
+                ST_WRITE_ACK: begin
+                    scl_drive_low <= 1'b1;
+                    sda_drive_low <= ~write_bit;
+                    cmd_ack <= 1'b1;
+                    state <= ST_READY;
+                end
+
+                ST_READ_SETUP: begin
+                    scl_drive_low <= 1'b1;
+                    sda_drive_low <= 1'b0;
+                    state <= ST_READ_WAIT;
+                end
+
+                ST_READ_WAIT: begin
+                    scl_drive_low <= 1'b0;
+                    sda_drive_low <= 1'b0;
+                    if (scl_i) begin
+                        bit_out <= sda_i;
+                        state <= ST_READ_ACK;
+                    end
+                end
+
+                ST_READ_ACK: begin
+                    scl_drive_low <= 1'b1;
+                    sda_drive_low <= 1'b0;
+                    cmd_ack <= 1'b1;
+                    state <= ST_READY;
+                end
+
+                default: begin
+                    state <= ST_READY;
+                end
+            endcase
+        end
+    end
+
+endmodule
*** End Patch


Exit code: 0
Wall time: 0 seconds
Output:
Success. Updated the following files:
A /app/dut.sv
The implementation is in place. I’ll run the available lint/syntax tooling now; if there’s no simulator installed, I’ll at least report that clearly.
shell
command -v iverilog
output
Chunk ID: 375e7f
Wall time: 0.0000 seconds
Process exited with code 0
Original token count: 5
Output:
/usr/bin/iverilog
shell
command -v verilator
output
Chunk ID: 58f01d
Wall time: 0.0000 seconds
Process exited with code 1
Original token count: 0
Output:
shell
sed -n '1,260p' /app/dut.sv
output
Chunk ID: 335124
Wall time: 0.0000 seconds
Process exited with code 0
Original token count: 1671
Output:
module TopModule(
    input clk,
    input rst,
    input cmd_valid,
    input bit_in,
    input scl_i,
    input sda_i,
    input [1:0] cmd,
    output cmd_ack,
    output busy,
    output al,
    output bit_out,
    output scl_drive_low,
    output sda_drive_low
);

    I2cCommandController controller (
        .clk(clk),
        .rst(rst),
        .cmd_valid(cmd_valid),
        .bit_in(bit_in),
        .scl_i(scl_i),
        .sda_i(sda_i),
        .cmd(cmd),
        .cmd_ack(cmd_ack),
        .busy(busy),
        .al(al),
        .bit_out(bit_out),
        .scl_drive_low(scl_drive_low),
        .sda_drive_low(sda_drive_low)
    );

endmodule

module I2cCommandController(
    input logic clk,
    input logic rst,
    input logic cmd_valid,
    input logic bit_in,
    input logic scl_i,
    input logic sda_i,
    input logic [1:0] cmd,
    output logic cmd_ack,
    output logic busy,
    output logic al,
    output logic bit_out,
    output logic scl_drive_low,
    output logic sda_drive_low
);

    localparam [3:0]
        ST_READY          = 4'd0,
        ST_START_WAIT     = 4'd1,
        ST_START_SDA_LOW  = 4'd2,
        ST_START_ACK      = 4'd3,
        ST_STOP_SETUP     = 4'd4,
        ST_STOP_WAIT      = 4'd5,
        ST_STOP_ACK       = 4'd6,
        ST_WRITE_SETUP    = 4'd7,
        ST_WRITE_WAIT     = 4'd8,
        ST_WRITE_ACK      = 4'd9,
        ST_READ_SETUP     = 4'd10,
        ST_READ_WAIT      = 4'd11,
        ST_READ_ACK       = 4'd12;

    localparam [1:0]
        CMD_START = 2'd0,
        CMD_STOP  = 2'd1,
        CMD_WRITE = 2'd2,
        CMD_READ  = 2'd3;

    logic [3:0] state;
    logic write_bit;

    always_ff @(posedge clk) begin
        if (rst) begin
            state <= ST_READY;
            write_bit <= 1'b0;
            cmd_ack <= 1'b0;
            busy <= 1'b0;
            al <= 1'b0;
            bit_out <= 1'b0;
            scl_drive_low <= 1'b0;
            sda_drive_low <= 1'b0;
        end else begin
            cmd_ack <= 1'b0;

            case (state)
                ST_READY: begin
                    if (cmd_valid) begin
                        case (cmd)
                            CMD_START: begin
                                busy <= 1'b1;
                                scl_drive_low <= 1'b0;
                                sda_drive_low <= 1'b0;
                                state <= ST_START_WAIT;
                            end

                            CMD_STOP: begin
                                if (busy) begin
                                    scl_drive_low <= 1'b1;
                                    sda_drive_low <= 1'b1;
                                    state <= ST_STOP_SETUP;
                                end
                            end

                            CMD_WRITE: begin
                                if (busy) begin
                                    write_bit <= bit_in;
                                    scl_drive_low <= 1'b1;
                                    sda_drive_low <= ~bit_in;
                                    state <= ST_WRITE_SETUP;
                                end
                            end

                            CMD_READ: begin
                                if (busy) begin
                                    scl_drive_low <= 1'b1;
                                    sda_drive_low <= 1'b0;
                                    state <= ST_READ_SETUP;
                                end
                            end
                        endcase
                    end
                end

                ST_START_WAIT: begin
                    scl_drive_low <= 1'b0;
                    sda_drive_low <= 1'b0;
                    if (scl_i) begin
                        if (!sda_i) begin
                            al <= 1'b1;
                        end
                        state <= ST_START_SDA_LOW;
                    end
                end

                ST_START_SDA_LOW: begin
                    scl_drive_low <= 1'b0;
                    sda_drive_low <= 1'b1;
                    state <= ST_START_ACK;
                end

                ST_START_ACK: begin
                    scl_drive_low <= 1'b1;
                    sda_drive_low <= 1'b1;
                    cmd_ack <= 1'b1;
                    state <= ST_READY;
                end

                ST_STOP_SETUP: begin
                    scl_drive_low <= 1'b1;
                    sda_drive_low <= 1'b1;
                    state <= ST_STOP_WAIT;
                end

                ST_STOP_WAIT: begin
                    scl_drive_low <= 1'b0;
                    sda_drive_low <= 1'b1;
                    if (scl_i) begin
                        state <= ST_STOP_ACK;
                    end
                end

                ST_STOP_ACK: begin
                    scl_drive_low <= 1'b0;
                    sda_drive_low <= 1'b0;
                    busy <= 1'b0;
                    cmd_ack <= 1'b1;
                    state <= ST_READY;
                end

                ST_WRITE_SETUP: begin
                    scl_drive_low <= 1'b1;
                    sda_drive_low <= ~write_bit;
                    state <= ST_WRITE_WAIT;
                end

                ST_WRITE_WAIT: begin
                    scl_drive_low <= 1'b0;
                    sda_drive_low <= ~write_bit;
                    if (scl_i) begin
                        if (write_bit && !sda_i) begin
                            al <= 1'b1;
                        end
                        state <= ST_WRITE_ACK;
                    end
                end

                ST_WRITE_ACK: begin
                    scl_drive_low <= 1'b1;
                    sda_drive_low <= ~write_bit;
                    cmd_ack <= 1'b1;
                    state <= ST_READY;
                end

                ST_READ_SETUP: begin
                    scl_drive_low <= 1'b1;
                    sda_drive_low <= 1'b0;
                    state <= ST_READ_WAIT;
                end

                ST_READ_WAIT: begin
                    scl_drive_low <= 1'b0;
                    sda_drive_low <= 1'b0;
                    if (scl_i) begin
                        bit_out <= sda_i;
                        state <= ST_READ_ACK;
                    end
                end

                ST_READ_ACK: begin
                    scl_drive_low <= 1'b1;
                    sda_drive_low <= 1'b0;
                    cmd_ack <= 1'b1;
                    state <= ST_READY;
                end

                default: begin
                    state <= ST_READY;
                end
            endcase
        end
    end

endmodule
shell
iverilog -g2012 -Wall -tnull /app/dut.sv
output
Chunk ID: e0c4ea
Wall time: 0.0000 seconds
Process exited with code 0
Original token count: 0
Output:
Implemented [dut.sv](/app/dut.sv) with `TopModule` instantiating `I2cCommandController`. Key behavior covered: - Synchronous active-high reset clears all outputs. - All outputs are registered. - Command FSM enforces legal accept rules and one-cycle `cmd_ack`. - Start/stop/write/read phase timing follows the requested registered delays. - Open-drain drive outputs use `1` to pull low and `0` to release. - `al` is sticky until reset and only asserts in start/write-1 high-SCL observation phases. Verified syntax with: ```bash iverilog -g2012 -Wall -tnull /app/dut.sv ```
Final diff , what the agent changed

No file changes, the agent left the workspace untouched.

Verifier output , the proof behind the reward
tests/test.sh
MISMATCH_COUNTS cmd_ack=0 busy=0 al=0 bit_out=0 scl=0 sda=0
__CHIPBENCH_MISMATCH_SUMMARY__: mismatches=0 samples=2351

Reproduce this trial: git checkout 2f94510 && PYTHONPATH=src python3 scripts/build_site.py , then open trial/trial_475ed19326d84f15. Re-running the agent live requires EVAL_PLATFORM_ENABLE_OAUTH_SMOKE=1 and is non-deterministic.

Trial trial_475ed19326d84f15 · verifier authoritative; classifier explanatory.