---
phase: 05-enhance-section-aware-reading
verified: 2026-01-27T19:00:00Z
status: gaps_found
score: 3/7 must-haves verified
gaps:
  - truth: "An agent can call `grep_content` and receive a `section_end_hint`."
    status: failed
    reason: "The `grep_content` tool was not modified to support section end hints."
    artifacts:
      - path: "src/fs_mcp/server.py"
        issue: "The function signature for `grep_content` does not include the `section_patterns` parameter, and there is no implementation for hint generation."
    missing:
      - "`section_patterns: Optional[List[str]] = None` parameter in `grep_content` function signature."
      - "Logic to scan for section end patterns after a match is found."
      - "Inclusion of `section_end_hint` in the output string for each match."
  - truth: "The `section_end_hint` is generated based on a default list of patterns."
    status: failed
    reason: "Hint generation logic is completely missing from `grep_content`."
    artifacts:
      - path: "src/fs_mcp/server.py"
        issue: "No code was added to define or use default patterns for hint generation."
    missing:
      - "Default pattern list within the `grep_content` function."
      - "Conditional logic to use default patterns when `section_patterns` is None."
  - truth: "An agent can provide a custom list of regex patterns to generate the `section_end_hint`."
    status: failed
    reason: "Hint generation logic is completely missing from `grep_content`."
    artifacts:
      - path: "src/fs_mcp/server.py"
        issue: "No code was added to accept or process custom patterns."
    missing:
      - "Processing of the `section_patterns` parameter to use the provided list of regexes."
---

# Phase 5: Enhance Section-Aware Reading Verification Report

**Phase Goal:** Enable agents to read logical sections of code without pre-calculating end lines.
**Verified:** 2026-01-27T19:00:00Z
**Status:** gaps_found
**Re-verification:** No — initial verification

## Goal Achievement

The phase goal is partially achieved. The `read_files` tool was successfully enhanced to allow reading from a start line to a regex pattern. However, the corresponding enhancement to the `grep_content` tool, which was intended to provide `section_end_hint`s to make the `read_files` enhancement useful, was not implemented. This leaves a critical gap in the intended "grep -> read section" workflow.

### Observable Truths

| #   | Truth                                                                                                                              | Status     | Evidence                                                                                                       |
| --- | ---------------------------------------------------------------------------------------------------------------------------------- | ---------- | -------------------------------------------------------------------------------------------------------------- |
| 1   | Agent can call `read_files` with `start_line` and `read_to_next_pattern` and get content between that line and the pattern.         | ✓ VERIFIED | `src/fs_mcp/server.py` lines 261-300 contain the implementation.                                               |
| 2   | If `read_to_next_pattern` is not found, agent gets content to EOF with a note.                                                       | ✓ VERIFIED | `src/fs_mcp/server.py` lines 297-299 handle this case.                                                         |
| 3   | Calling `read_files` with conflicting parameters (`end_line` and `read_to_next_pattern`) results in a clear, structured error.     | ✓ VERIFIED | `src/fs_mcp/server.py` lines 212-220 and 222-230 contain validation logic.                                    |
| 4   | An agent can call `grep_content` and receive a `section_end_hint` along with each match.                                           | ✗ FAILED   | The `grep_content` function in `src/fs_mcp/server.py` was not modified.                                        |
| 5   | The `section_end_hint` is generated based on a default list of patterns.                                                             | ✗ FAILED   | No logic for hint generation or default patterns was added to `grep_content`.                                  |
| 6   | An agent can provide a custom list of regex patterns to generate the `section_end_hint`.                                           | ✗ FAILED   | The `section_patterns` parameter was not added to `grep_content`.                                              |
| 7   | An agent can disable the hint generation by passing an empty list.                                                                 | ✗ FAILED   | The `section_patterns` parameter was not added, so this functionality does not exist.                        |

**Score:** 3/7 truths verified

### Required Artifacts

| Artifact                | Expected                                                                 | Status    | Details                                                                    |
| ----------------------- | ------------------------------------------------------------------------ | --------- | -------------------------------------------------------------------------- |
| `src/fs_mcp/server.py`  | Enhanced `read_files` and `grep_content` functions.                      | ✗ PARTIAL | `read_files` is updated, but `grep_content` is missing its planned changes.|

### Key Link Verification

| From                          | To                                           | Via                                       | Status      | Details                                                    |
| ----------------------------- | -------------------------------------------- | ----------------------------------------- | ----------- | ---------------------------------------------------------- |
| `read_files` validation       | Structured error                             | `if` checks for conflicting params        | ✓ WIRED     | Implemented in `src/fs_mcp/server.py` lines 212-230.       |
| `read_files` loop             | Regex scanning for `read_to_next_pattern`    | `re.search()` on each line                | ✓ WIRED     | Implemented in `src/fs_mcp/server.py` line 291.            |
| `grep_content` result loop    | Secondary file scan for hint generation      | A nested loop for each grep match         | ✗ NOT_WIRED | The entire implementation for this is missing.             |

### Requirements Coverage

| Requirement | Status | Blocking Issue |
| ----------- | ------ | -------------- |
| N/A         | -      | -              |

### Anti-Patterns Found

| File                   | Line | Pattern                       | Severity | Impact                                             |
| ---------------------- | ---- | ----------------------------- | -------- | -------------------------------------------------- |
| `src/fs_mcp/server.py` | 710  | `# This is a placeholder...`  | ℹ️ Info  | Known placeholder in `grounding_search` tool, unrelated to this phase's goal. |

### Gaps Summary

The core gap is the complete omission of the planned enhancements to the `grep_content` tool as specified in `05-2-PLAN.md`. While the `read_files` tool was correctly updated to read sections of code, the intended mechanism for *discovering* those sections via `grep_content` is missing. An agent currently has no way to get the `section_end_hint` that would enable the full "grep -> read section" workflow. To close this gap, the `grep_content` function needs to be updated to accept `section_patterns`, implement the hint generation logic, and include the hints in its output.

---

_Verified: 2026-01-27T19:00:00Z_
_Verifier: Claude (gsd-verifier)_
