spreadsheet-mcp 0.10.1

Stateful MCP server for spreadsheet analysis and editing — token-efficient tools for LLM agents to read, profile, edit, and recalculate .xlsx workbooks
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158

use super::cells::RawCell;
use anyhow::Result;
use schemars::JsonSchema;
use serde::Serialize;
use std::cmp::Ordering;

#[derive(Debug, Serialize, Clone, JsonSchema)]
#[serde(tag = "type", rename_all = "snake_case")]
pub enum CellDiff {
    Added {
        address: String,
        value: Option<String>,
        formula: Option<String>,
    },
    Deleted {
        address: String,
        old_value: Option<String>,
    },
    Modified {
        address: String,
        subtype: ModificationType,
        old_value: Option<String>,
        new_value: Option<String>,
        old_formula: Option<String>,
        new_formula: Option<String>,
        old_style_id: Option<u32>,
        new_style_id: Option<u32>,
    },
}

#[derive(Debug, Serialize, Clone, JsonSchema)]
#[serde(rename_all = "snake_case")]
pub enum ModificationType {
    FormulaEdit,
    RecalcResult,
    ValueEdit,
    StyleEdit,
}

pub fn diff_streams(
    base: impl Iterator<Item = Result<RawCell>>,
    fork: impl Iterator<Item = Result<RawCell>>,
) -> Result<Vec<CellDiff>> {
    let mut diffs = Vec::new();
    let mut base_iter = base.peekable();
    let mut fork_iter = fork.peekable();

    loop {
        // Handle errors in stream
        if let Some(Err(_)) = base_iter.peek() {
            return Err(base_iter.next().unwrap().unwrap_err());
        }
        if let Some(Err(_)) = fork_iter.peek() {
            return Err(fork_iter.next().unwrap().unwrap_err());
        }

        // Get references to Ok items
        let b_opt = base_iter.peek().map(|r| r.as_ref().unwrap());
        let f_opt = fork_iter.peek().map(|r| r.as_ref().unwrap());

        match (b_opt, f_opt) {
            (None, None) => break,
            (Some(b), None) => {
                diffs.push(CellDiff::Deleted {
                    address: b.address.original.clone(),
                    old_value: b.value.clone(),
                });
                base_iter.next();
            }
            (None, Some(f)) => {
                diffs.push(CellDiff::Added {
                    address: f.address.original.clone(),
                    value: f.value.clone(),
                    formula: f.formula.clone(),
                });
                fork_iter.next();
            }
            (Some(b), Some(f)) => {
                match b.address.cmp(&f.address) {
                    Ordering::Less => {
                        // Base is behind -> Deleted
                        diffs.push(CellDiff::Deleted {
                            address: b.address.original.clone(),
                            old_value: b.value.clone(),
                        });
                        base_iter.next();
                    }
                    Ordering::Greater => {
                        // Fork is behind -> Added
                        diffs.push(CellDiff::Added {
                            address: f.address.original.clone(),
                            value: f.value.clone(),
                            formula: f.formula.clone(),
                        });
                        fork_iter.next();
                    }
                    Ordering::Equal => {
                        // Same address -> Compare
                        if let Some(diff) = compare_cells(b, f) {
                            diffs.push(diff);
                        }
                        base_iter.next();
                        fork_iter.next();
                    }
                }
            }
        }
    }

    Ok(diffs)
}

fn compare_cells(base: &RawCell, fork: &RawCell) -> Option<CellDiff> {
    let formula_changed = base.formula != fork.formula;
    let value_changed = !values_equal(&base.value, &fork.value);
    let style_changed = base.style_id != fork.style_id;

    if !formula_changed && !value_changed && !style_changed {
        return None;
    }

    let subtype = if style_changed && !formula_changed && !value_changed {
        ModificationType::StyleEdit
    } else {
        match (formula_changed, value_changed, fork.formula.is_some()) {
            (true, _, _) => ModificationType::FormulaEdit,
            (false, true, true) => ModificationType::RecalcResult,
            (false, true, false) => ModificationType::ValueEdit,
            _ => return None, // Should be covered above
        }
    };

    Some(CellDiff::Modified {
        address: fork.address.original.clone(),
        subtype,
        old_value: base.value.clone(),
        new_value: fork.value.clone(),
        old_formula: base.formula.clone(),
        new_formula: fork.formula.clone(),
        old_style_id: if style_changed { base.style_id } else { None },
        new_style_id: if style_changed { fork.style_id } else { None },
    })
}

fn values_equal(a: &Option<String>, b: &Option<String>) -> bool {
    match (a, b) {
        (None, None) => true,
        (Some(a), Some(b)) => {
            // Try numeric comparison with epsilon
            if let (Ok(fa), Ok(fb)) = (a.parse::<f64>(), b.parse::<f64>()) {
                (fa - fb).abs() < 1e-9
            } else {
                a == b
            }
        }
        _ => false,
    }
}