What This Category of Data Looks Like
Data for infrastructure construction declaration materials and case files primarily originates from project approval documents, construction permit materials, cost budget ledgers, on-site visa records, and completion acceptance files. The update schedule aligns with project progress phases:
- Update declaration materials during the project initiation phase
- Sync on-site visa and progress documents during the construction phase
- Complete full file archiving during the completion phase
The document structure of a single case file includes project basic information forms, qualification certification documents, bills of quantities, transcribed text from scanned construction drawings, and more. Fields include project number (with exclusive engineering code format), budget amount (unit: yuan, accurate to cents), construction period (unit: days), qualification level of participating construction units, and others. Some transcribed text from scanned documents contains formatting errors.
Constraints Imposed on Multi-turn Dialogue and Prompt Engineering
Project declaration material and case file fields have exclusive format and unit requirements. Prompts must clearly define verification rules to prevent unit errors or format deviations in review results. The total text volume of a single case file is large. Multi-turn dialogue context length must support long text loading to avoid context truncation. Data update frequency changes based on project phases. The dialogue link must dynamically call the latest project data. Prompts must support real-time variable injection. Some transcribed scanned document text has formatting errors. Multi-turn dialogue history must retain context information for format repair to maintain coherent review logic.
Configuration Settings
Reference only; verify against the target FastGPT release and deployment documentation.
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
| Maximum Context Length | 8000–12000 characters | Matches total text volume of a complete single case file and multi-turn interactions |
| Historical Dialogue Turn Limit | First 6 turns | Focuses on recent valid interactions to avoid context overload that reduces review efficiency |
| Prompt Variable Injection | Bind variables by project | Matches exclusive fields of declaration materials and dynamically updated project data |
| Dialogue Timeout | 120 seconds | Adapts to text parsing and review processing time for large case files |
| Historical Dialogue Parameter Passing | Bind messages field | Ensures each dialogue carries complete historical interaction content |
| Exception Logging | Enable full-link logging | Covers all links including model responses, workflow execution, and context transfer |
Three Common Configuration Errors
- Workflow dialogue displays failure, but model backend has response logs: The interface returns a 500 status code or "execution failed" prompt. Backend logs show the model generated normal response content. The root cause is failure to correctly bind
chatId, which prevents the workflow from associating dialogue context and receiving or processing model output. - Historical dialogue content is not passed when calling custom nodes: The dialogue return result does not reference previously entered project number, budget amount, or other relevant information. The root cause is failure to bind the
messagesfield in node configuration, so historical interaction content is not sent to the current processing link. - Application dialogue triggers an abnormal error, but no logs are retained: The interface displays an error prompt, but no corresponding abnormal record exists in system logs. The root cause is failure to enable full-link exception logging, so context transfer or model call exceptions during workflow execution are not captured.
How to Verify Proper Configuration
- Initiate a test dialogue with previously entered project information, confirm that the returned review result references historical input data such as project number and budget amount.
- Trigger a simulated exception scenario, such as entering a declaration material field with incorrect format, check that the system log generates a complete link record including
chatId,messages, andvariables. - Review the prompt configuration, confirm that variables for project-exclusive fields are bound, and that verification rules match the unit and format requirements of declaration materials.
- Adjust the context length threshold to a lower range, test that normal dialogue completion occurs when loading ultra-large case files, with no timeout error prompts.
The values provided are common starting points and should be measured against the reader's own samples.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-28.