diff --git a/server/src/__tests__/company-search-service.test.ts b/server/src/__tests__/company-search-service.test.ts
index 4d75a8e3f79..a240b2d02b3 100644
--- a/server/src/__tests__/company-search-service.test.ts
+++ b/server/src/__tests__/company-search-service.test.ts
@@ -108,6 +108,32 @@ describeEmbeddedPostgres("companySearchService", () => {
     return id;
   }
 
+  async function createAgent(companyId: string, values: Partial<typeof agents.$inferInsert> = {}) {
+    const id = values.id ?? randomUUID();
+    await db.insert(agents).values({
+      id,
+      companyId,
+      name: values.name ?? "Search agent",
+      role: values.role ?? "engineer",
+      title: values.title ?? null,
+      capabilities: values.capabilities ?? null,
+      ...values,
+    });
+    return id;
+  }
+
+  async function createProject(companyId: string, values: Partial<typeof projects.$inferInsert> = {}) {
+    const id = values.id ?? randomUUID();
+    await db.insert(projects).values({
+      id,
+      companyId,
+      name: values.name ?? "Search project",
+      description: values.description ?? null,
+      ...values,
+    });
+    return id;
+  }
+
   it("ranks exact issue identifiers before weaker title matches", async () => {
     const companyId = await createCompany();
     const exactId = await createIssue(companyId, {
@@ -198,6 +224,171 @@ describeEmbeddedPostgres("companySearchService", () => {
     expect(result.results.map((item) => item.id)).toEqual([visibleId]);
   });
 
+  it("treats bare SQL wildcard characters as literals instead of match-all queries", async () => {
+    const companyId = await createCompany();
+    const issueId = await createIssue(companyId, {
+      identifier: "TST-20",
+      title: "Plain issue target",
+      description: "Plain issue description",
+    });
+    await db.insert(issueComments).values({
+      companyId,
+      issueId,
+      body: "Plain comment body",
+    });
+    const documentId = randomUUID();
+    await db.insert(documents).values({
+      id: documentId,
+      companyId,
+      title: "Plain document",
+      latestBody: "Plain document body",
+      format: "markdown",
+    });
+    await db.insert(issueDocuments).values({
+      companyId,
+      issueId,
+      documentId,
+      key: "plain",
+    });
+    await createAgent(companyId, {
+      name: "Plain Agent",
+      role: "engineer",
+      capabilities: "Plain agent capabilities",
+    });
+    await createProject(companyId, {
+      name: "Plain Project",
+      description: "Plain project description",
+    });
+
+    for (const q of ["%", "_", "\\"]) {
+      const result = await svc.search(companyId, companySearchQuerySchema.parse({ q }));
+      expect(result.results, `q=${q}`).toEqual([]);
+    }
+  });
+
+  it("matches percent characters literally across issue, comment, document, agent, and project results", async () => {
+    const companyId = await createCompany();
+    const issueMatchId = await createIssue(companyId, {
+      identifier: "TST-21",
+      title: "Release 100% checklist",
+    });
+    const issueDecoyId = await createIssue(companyId, {
+      identifier: "TST-22",
+      title: "Release 1000 checklist",
+    });
+    const commentMatchId = await createIssue(companyId, {
+      identifier: "TST-23",
+      title: "Comment literal holder",
+    });
+    const commentDecoyId = await createIssue(companyId, {
+      identifier: "TST-24",
+      title: "Comment decoy holder",
+    });
+    await db.insert(issueComments).values([
+      {
+        companyId,
+        issueId: commentMatchId,
+        body: "QA is 100% confident in this result.",
+      },
+      {
+        companyId,
+        issueId: commentDecoyId,
+        body: "QA is 1000 confident in this result.",
+      },
+    ]);
+    const documentMatchIssueId = await createIssue(companyId, {
+      identifier: "TST-25",
+      title: "Document literal holder",
+    });
+    const documentDecoyIssueId = await createIssue(companyId, {
+      identifier: "TST-26",
+      title: "Document decoy holder",
+    });
+    const documentMatchId = randomUUID();
+    const documentDecoyId = randomUUID();
+    await db.insert(documents).values([
+      {
+        id: documentMatchId,
+        companyId,
+        title: "Literal rollout",
+        latestBody: "Ship 100% complete adapter support.",
+        format: "markdown",
+      },
+      {
+        id: documentDecoyId,
+        companyId,
+        title: "Decoy rollout",
+        latestBody: "Ship 1000 complete adapter support.",
+        format: "markdown",
+      },
+    ]);
+    await db.insert(issueDocuments).values([
+      {
+        companyId,
+        issueId: documentMatchIssueId,
+        documentId: documentMatchId,
+        key: "literal",
+      },
+      {
+        companyId,
+        issueId: documentDecoyIssueId,
+        documentId: documentDecoyId,
+        key: "decoy",
+      },
+    ]);
+    const agentMatchId = await createAgent(companyId, {
+      name: "100% Specialist",
+      role: "engineer",
+    });
+    const agentDecoyId = await createAgent(companyId, {
+      name: "1000 Specialist",
+      role: "engineer",
+    });
+    const projectMatchId = await createProject(companyId, {
+      name: "100% Launch Plan",
+    });
+    const projectDecoyId = await createProject(companyId, {
+      name: "1000 Launch Plan",
+    });
+
+    const result = await svc.search(companyId, companySearchQuerySchema.parse({ q: "100%" }));
+    const ids = result.results.map((row) => row.id);
+
+    expect(ids).toEqual(expect.arrayContaining([
+      issueMatchId,
+      commentMatchId,
+      documentMatchIssueId,
+      agentMatchId,
+      projectMatchId,
+    ]));
+    expect(ids).not.toEqual(expect.arrayContaining([
+      issueDecoyId,
+      commentDecoyId,
+      documentDecoyIssueId,
+      agentDecoyId,
+      projectDecoyId,
+    ]));
+  });
+
+  it("escapes underscore and backslash characters in issue phrase and token patterns", async () => {
+    const companyId = await createCompany();
+    const literalId = await createIssue(companyId, {
+      identifier: "TST-27",
+      title: "Literal foo_bar path c:\\tmp",
+    });
+    const decoyId = await createIssue(companyId, {
+      identifier: "TST-28",
+      title: "Decoy fooXbar path c:tmp",
+    });
+
+    for (const q of ["foo_bar", "c:\\tmp"]) {
+      const result = await svc.search(companyId, companySearchQuerySchema.parse({ q, scope: "issues" }));
+      const ids = result.results.map((row) => row.id);
+      expect(ids, `q=${q}`).toContain(literalId);
+      expect(ids, `q=${q}`).not.toContain(decoyId);
+    }
+  });
+
   it("uses pg_trgm for conservative fuzzy title matches", async () => {
     const companyId = await createCompany();
     const issueId = await createIssue(companyId, {
diff --git a/server/src/services/company-search.ts b/server/src/services/company-search.ts
index 0705dc9fe46..ecb1eae0ee2 100644
--- a/server/src/services/company-search.ts
+++ b/server/src/services/company-search.ts
@@ -60,11 +60,15 @@ function normalizeQuery(query: string) {
   return query.trim().replace(/\s+/g, " ").toLowerCase();
 }
 
+function escapeLikePattern(value: string): string {
+  return value.replace(/[\\%_]/g, "\\$&");
+}
+
 function tokenizeQuery(normalizedQuery: string) {
   const matches = normalizedQuery.match(/"[^"]+"|[^\s]+/g) ?? [];
   const tokens: string[] = [];
   for (const match of matches) {
-    const token = match.replace(/^"|"$/g, "").replace(/^[^\p{L}\p{N}-]+|[^\p{L}\p{N}-]+$/gu, "");
+    const token = match.replace(/^"|"$/g, "").replace(/^[^\p{L}\p{N}%_\\-]+|[^\p{L}\p{N}%_\\-]+$/gu, "");
     if (token.length < MIN_TOKEN_LENGTH) continue;
     if (!tokens.includes(token)) tokens.push(token);
     if (tokens.length >= COMPANY_SEARCH_MAX_TOKENS) break;
@@ -86,7 +90,7 @@ function tokenMatchExpression(textExpression: SQL, tokenArray: SQL) {
     EXISTS (
       SELECT 1
       FROM unnest(${tokenArray}) AS search_token(value)
-      WHERE lower(coalesce(${textExpression}, '')) LIKE '%' || search_token.value || '%'
+      WHERE lower(coalesce(${textExpression}, '')) LIKE '%' || search_token.value || '%' ESCAPE '\\'
     )
   `;
 }
@@ -269,7 +273,7 @@ function scoreSimpleRow(row: SimpleSearchRow, normalizedQuery: string, tokens: s
 }
 
 function simpleTextCondition(fields: SQL[], containsPattern: string, tokenArray: SQL) {
-  const phraseConditions = fields.map((field) => sql<boolean>`lower(coalesce(${field}, '')) LIKE ${containsPattern}`);
+  const phraseConditions = fields.map((field) => sql<boolean>`lower(coalesce(${field}, '')) LIKE ${containsPattern} ESCAPE '\\'`);
   const tokenConditions = fields.map((field) => tokenMatchExpression(field, tokenArray));
   return sql<boolean>`(${sql.join([...phraseConditions, ...tokenConditions], sql` OR `)})`;
 }
@@ -308,19 +312,21 @@ export function companySearchService(db: Db) {
         .then((rows) => rows[0] ?? null);
       const prefix = routePrefix(company?.issuePrefix);
       const fetchLimit = companySearchBranchFetchLimit(limit);
-      const tokenArray = sqlTextArray(tokens);
+      const escapedTokens = tokens.map(escapeLikePattern);
+      const tokenArray = sqlTextArray(escapedTokens);
       const fuzzyTokens = fuzzyEligibleTokens(tokens);
       const fuzzyTokenArray = sqlTextArray(fuzzyTokens);
-      const containsPattern = `%${normalizedQuery}%`;
-      const startsWithPattern = `${normalizedQuery}%`;
-      const fuzzyEnabled = normalizedQuery.length >= MIN_FUZZY_QUERY_LENGTH;
+      const escapedQuery = escapeLikePattern(normalizedQuery);
+      const containsPattern = `%${escapedQuery}%`;
+      const startsWithPattern = `${escapedQuery}%`;
+      const fuzzyEnabled = normalizedQuery.length >= MIN_FUZZY_QUERY_LENGTH && !/[\\%_]/.test(normalizedQuery);
       const fuzzyTokensEnabled = fuzzyEnabled && fuzzyTokens.length > 0;
 
-      const titlePhraseMatch = sql<boolean>`lower(${issues.title}) LIKE ${containsPattern}`;
-      const titleStartsWith = sql<boolean>`lower(${issues.title}) LIKE ${startsWithPattern}`;
-      const identifierPhraseMatch = sql<boolean>`lower(coalesce(${issues.identifier}, '')) LIKE ${containsPattern}`;
-      const identifierStartsWith = sql<boolean>`lower(coalesce(${issues.identifier}, '')) LIKE ${startsWithPattern}`;
-      const descriptionPhraseMatch = sql<boolean>`lower(coalesce(${issues.description}, '')) LIKE ${containsPattern}`;
+      const titlePhraseMatch = sql<boolean>`lower(${issues.title}) LIKE ${containsPattern} ESCAPE '\\'`;
+      const titleStartsWith = sql<boolean>`lower(${issues.title}) LIKE ${startsWithPattern} ESCAPE '\\'`;
+      const identifierPhraseMatch = sql<boolean>`lower(coalesce(${issues.identifier}, '')) LIKE ${containsPattern} ESCAPE '\\'`;
+      const identifierStartsWith = sql<boolean>`lower(coalesce(${issues.identifier}, '')) LIKE ${startsWithPattern} ESCAPE '\\'`;
+      const descriptionPhraseMatch = sql<boolean>`lower(coalesce(${issues.description}, '')) LIKE ${containsPattern} ESCAPE '\\'`;
       const titleTokenMatch = tokenMatchExpression(sql`${issues.title}`, tokenArray);
       const identifierTokenMatch = tokenMatchExpression(sql`${issues.identifier}`, tokenArray);
       const descriptionTokenMatch = tokenMatchExpression(sql`${issues.description}`, tokenArray);
@@ -339,7 +345,7 @@ export function companySearchService(db: Db) {
           WHERE search_comments.company_id = ${companyId}
             AND search_comments.issue_id = issues.id
             AND (
-              lower(search_comments.body) LIKE ${containsPattern}
+              lower(search_comments.body) LIKE ${containsPattern} ESCAPE '\\'
               OR ${tokenMatchExpression(sql`search_comments.body`, tokenArray)}
             )
         )
@@ -354,8 +360,8 @@ export function companySearchService(db: Db) {
             AND search_documents.company_id = ${companyId}
             AND search_issue_documents.issue_id = issues.id
             AND (
-              lower(coalesce(search_documents.title, '')) LIKE ${containsPattern}
-              OR lower(search_documents.latest_body) LIKE ${containsPattern}
+              lower(coalesce(search_documents.title, '')) LIKE ${containsPattern} ESCAPE '\\'
+              OR lower(search_documents.latest_body) LIKE ${containsPattern} ESCAPE '\\'
               OR ${tokenMatchExpression(sql`search_documents.title`, tokenArray)}
               OR ${tokenMatchExpression(sql`search_documents.latest_body`, tokenArray)}
             )
@@ -399,15 +405,15 @@ export function companySearchService(db: Db) {
         (
           SELECT count(*)::int
           FROM unnest(${tokenArray}) AS search_token(value)
-          WHERE lower(${issues.title}) LIKE '%' || search_token.value || '%'
-            OR lower(coalesce(${issues.identifier}, '')) LIKE '%' || search_token.value || '%'
-            OR lower(coalesce(${issues.description}, '')) LIKE '%' || search_token.value || '%'
+          WHERE lower(${issues.title}) LIKE '%' || search_token.value || '%' ESCAPE '\\'
+            OR lower(coalesce(${issues.identifier}, '')) LIKE '%' || search_token.value || '%' ESCAPE '\\'
+            OR lower(coalesce(${issues.description}, '')) LIKE '%' || search_token.value || '%' ESCAPE '\\'
             OR EXISTS (
               SELECT 1
               FROM issue_comments coverage_comments
               WHERE coverage_comments.company_id = ${companyId}
                 AND coverage_comments.issue_id = issues.id
-                AND lower(coverage_comments.body) LIKE '%' || search_token.value || '%'
+                AND lower(coverage_comments.body) LIKE '%' || search_token.value || '%' ESCAPE '\\'
             )
             OR EXISTS (
               SELECT 1
@@ -418,8 +424,8 @@ export function companySearchService(db: Db) {
                 AND coverage_documents.company_id = ${companyId}
                 AND coverage_issue_documents.issue_id = issues.id
                 AND (
-                  lower(coalesce(coverage_documents.title, '')) LIKE '%' || search_token.value || '%'
-                  OR lower(coverage_documents.latest_body) LIKE '%' || search_token.value || '%'
+                  lower(coalesce(coverage_documents.title, '')) LIKE '%' || search_token.value || '%' ESCAPE '\\'
+                  OR lower(coverage_documents.latest_body) LIKE '%' || search_token.value || '%' ESCAPE '\\'
                 )
             )
         )
@@ -477,11 +483,11 @@ export function companySearchService(db: Db) {
                 WHERE search_comments.company_id = ${companyId}
                   AND search_comments.issue_id = issues.id
                   AND (
-                    lower(search_comments.body) LIKE ${containsPattern}
+                    lower(search_comments.body) LIKE ${containsPattern} ESCAPE '\\'
                     OR ${tokenMatchExpression(sql`search_comments.body`, tokenArray)}
                   )
                 ORDER BY
-                  CASE WHEN lower(search_comments.body) LIKE ${containsPattern} THEN 0 ELSE 1 END,
+                  CASE WHEN lower(search_comments.body) LIKE ${containsPattern} ESCAPE '\\' THEN 0 ELSE 1 END,
                   search_comments.updated_at DESC,
                   search_comments.id DESC
                 LIMIT 1
@@ -494,11 +500,11 @@ export function companySearchService(db: Db) {
                 WHERE search_comments.company_id = ${companyId}
                   AND search_comments.issue_id = issues.id
                   AND (
-                    lower(search_comments.body) LIKE ${containsPattern}
+                    lower(search_comments.body) LIKE ${containsPattern} ESCAPE '\\'
                     OR ${tokenMatchExpression(sql`search_comments.body`, tokenArray)}
                   )
                 ORDER BY
-                  CASE WHEN lower(search_comments.body) LIKE ${containsPattern} THEN 0 ELSE 1 END,
+                  CASE WHEN lower(search_comments.body) LIKE ${containsPattern} ESCAPE '\\' THEN 0 ELSE 1 END,
                   search_comments.updated_at DESC,
                   search_comments.id DESC
                 LIMIT 1
@@ -514,15 +520,15 @@ export function companySearchService(db: Db) {
                   AND search_documents.company_id = ${companyId}
                   AND search_issue_documents.issue_id = issues.id
                   AND (
-                    lower(coalesce(search_documents.title, '')) LIKE ${containsPattern}
-                    OR lower(search_documents.latest_body) LIKE ${containsPattern}
+                    lower(coalesce(search_documents.title, '')) LIKE ${containsPattern} ESCAPE '\\'
+                    OR lower(search_documents.latest_body) LIKE ${containsPattern} ESCAPE '\\'
                     OR ${tokenMatchExpression(sql`search_documents.title`, tokenArray)}
                     OR ${tokenMatchExpression(sql`search_documents.latest_body`, tokenArray)}
                   )
                 ORDER BY
                   CASE
-                    WHEN lower(coalesce(search_documents.title, '')) LIKE ${containsPattern} THEN 0
-                    WHEN lower(search_documents.latest_body) LIKE ${containsPattern} THEN 1
+                    WHEN lower(coalesce(search_documents.title, '')) LIKE ${containsPattern} ESCAPE '\\' THEN 0
+                    WHEN lower(search_documents.latest_body) LIKE ${containsPattern} ESCAPE '\\' THEN 1
                     ELSE 2
                   END,
                   search_documents.updated_at DESC,
@@ -540,8 +546,8 @@ export function companySearchService(db: Db) {
                   AND search_documents.company_id = ${companyId}
                   AND search_issue_documents.issue_id = issues.id
                   AND (
-                    lower(coalesce(search_documents.title, '')) LIKE ${containsPattern}
-                    OR lower(search_documents.latest_body) LIKE ${containsPattern}
+                    lower(coalesce(search_documents.title, '')) LIKE ${containsPattern} ESCAPE '\\'
+                    OR lower(search_documents.latest_body) LIKE ${containsPattern} ESCAPE '\\'
                     OR ${tokenMatchExpression(sql`search_documents.title`, tokenArray)}
                     OR ${tokenMatchExpression(sql`search_documents.latest_body`, tokenArray)}
                   )
@@ -559,8 +565,8 @@ export function companySearchService(db: Db) {
                   AND search_documents.company_id = ${companyId}
                   AND search_issue_documents.issue_id = issues.id
                   AND (
-                    lower(coalesce(search_documents.title, '')) LIKE ${containsPattern}
-                    OR lower(search_documents.latest_body) LIKE ${containsPattern}
+                    lower(coalesce(search_documents.title, '')) LIKE ${containsPattern} ESCAPE '\\'
+                    OR lower(search_documents.latest_body) LIKE ${containsPattern} ESCAPE '\\'
                     OR ${tokenMatchExpression(sql`search_documents.title`, tokenArray)}
                     OR ${tokenMatchExpression(sql`search_documents.latest_body`, tokenArray)}
                   )