diff --git a/.gitignore b/.gitignore
index c466de2..44ed79b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 __tests__/runner/*
 
 lib/*
+dist/src/
 rollup.config.js
 # ^^^ compiled output of rollup.config.ts (generated by --configPlugin at build time)
 # comment out in distribution branches
diff --git a/README.md b/README.md
index 581ad8c..ca6cc28 100644
--- a/README.md
+++ b/README.md
@@ -112,6 +112,22 @@ with:
   path: path-to-comment-contents.txt
 ```
 
+### Embed file content inside a message template
+
+Use `{{{content}}}` as a placeholder in the `message` to insert file content at that position.
+
+````yaml
+- name: Run Test
+  run: rake test > result.txt
+- uses: marocchino/sticky-pull-request-comment@v3
+  with:
+    path: result.txt
+    message: |
+      ```
+      {{{content}}}
+      ```
+````
+
 ### Delete the previous comment and add a comment at the end
 
 ```yaml
@@ -220,11 +236,11 @@ For more detailed information about permissions, you can read from the link belo
 
 ### `message`
 
-**Optional** Comment message
+**Optional** Comment message. When used together with `path`, use `{{{content}}}` as a placeholder in the message where the file content should be inserted.
 
 ### `path`
 
-**Optional** Path to file containing comment message
+**Optional** Path to file containing comment message. When `message` is also provided and contains `{{{content}}}`, the file content is embedded at that placeholder position.
 
 ### `number`
 
diff --git a/__tests__/config.test.ts b/__tests__/config.test.ts
index b44a433..cee11df 100644
--- a/__tests__/config.test.ts
+++ b/__tests__/config.test.ts
@@ -210,4 +210,61 @@ describe("getBody", () => {
     expect(await config.getBody()).toBe("")
     expect(core.setFailed).toHaveBeenCalledWith("glob error")
   })
+
+  test("embeds file content in message when {{{content}}} placeholder is used", async () => {
+    const {config, core} = await loadConfig()
+    vi.mocked(core.getMultilineInput).mockReturnValue(["__tests__/assets/result"])
+    vi.mocked(core.getInput).mockImplementation(name => {
+      if (name === "message") return "```\n{{{content}}}\n```"
+      return ""
+    })
+    mockGlobCreate.mockResolvedValue({
+      glob: vi.fn().mockResolvedValue([resolve("__tests__/assets/result")]),
+    })
+    expect(await config.getBody()).toBe("```\nhi there\n\n```")
+  })
+
+  test("replaces {{{content}}} in message with file content", async () => {
+    const {config, core} = await loadConfig()
+    vi.mocked(core.getMultilineInput).mockReturnValue(["__tests__/assets/result"])
+    vi.mocked(core.getInput).mockImplementation(name => {
+      if (name === "message") return "{{{content}}}\n---\n{{{content}}}"
+      return ""
+    })
+    mockGlobCreate.mockResolvedValue({
+      glob: vi.fn().mockResolvedValue([resolve("__tests__/assets/result")]),
+    })
+    expect(await config.getBody()).toBe("hi there\n\n---\n{{{content}}}")
+  })
+
+  test("uses message as body when path is provided but message has no {{{content}}} placeholder", async () => {
+    const {config, core} = await loadConfig()
+    vi.mocked(core.getMultilineInput).mockReturnValue(["__tests__/assets/result"])
+    vi.mocked(core.getInput).mockImplementation(name => {
+      if (name === "message") return "no placeholder here"
+      return ""
+    })
+    mockGlobCreate.mockResolvedValue({
+      glob: vi.fn().mockResolvedValue([resolve("__tests__/assets/result")]),
+    })
+    expect(await config.getBody()).toBe("no placeholder here")
+  })
+
+  test("embeds multiple files content in message when {{{content}}} placeholder is used", async () => {
+    const {config, core} = await loadConfig()
+    vi.mocked(core.getMultilineInput).mockReturnValue(["__tests__/assets/*"])
+    vi.mocked(core.getInput).mockImplementation(name => {
+      if (name === "message") return "```\n{{{content}}}\n```"
+      return ""
+    })
+    mockGlobCreate.mockResolvedValue({
+      glob: vi
+        .fn()
+        .mockResolvedValue([
+          resolve("__tests__/assets/result"),
+          resolve("__tests__/assets/result2"),
+        ]),
+    })
+    expect(await config.getBody()).toBe("```\nhi there\n\nhey there\n\n```")
+  })
 })
diff --git a/action.yml b/action.yml
index d14ce06..8bfec43 100644
--- a/action.yml
+++ b/action.yml
@@ -52,10 +52,10 @@ inputs:
     default: "OUTDATED"
     required: false
   message:
-    description: "comment message"
+    description: "comment message. When used together with path, use `{{{content}}}` as a placeholder in the message where the file content should be inserted."
     required: false
   path:
-    description: "glob path to file(s) containing comment message"
+    description: "glob path to file(s) containing comment message. When message is also provided and contains `{{{content}}}`, the file content is embedded at that placeholder position."
     required: false
   ignore_empty:
     description: "Indicates whether to ignore missing or empty messages"
diff --git a/src/config.ts b/src/config.ts
index bc71ddf..d1a4d1d 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -50,20 +50,27 @@ export async function getBody(): Promise<string> {
   const followSymbolicLinks = core.getBooleanInput("follow_symbolic_links", {
     required: true,
   })
+  const messageInput = core.getInput("message", {required: false})
+
   if (pathInput && pathInput.length > 0) {
     try {
       const globber = await create(pathInput.join("\n"), {
         followSymbolicLinks,
         matchDirectories: false,
       })
-      return (await globber.glob()).map(path => readFileSync(path, "utf-8")).join("\n")
+      const fileContent = (await globber.glob())
+        .map(path => readFileSync(path, "utf-8"))
+        .join("\n")
+      if (messageInput) {
+        return messageInput.replace("{{{content}}}", fileContent)
+      }
+      return fileContent
     } catch (error) {
       if (error instanceof Error) {
         core.setFailed(error.message)
       }
       return ""
     }
-  } else {
-    return core.getInput("message", {required: false})
   }
+  return messageInput
 }